History of Pete Alonso in Timeline

Pete Alonso, nicknamed "Polar Bear," is a professional baseball first baseman playing for the New York Mets in MLB. He represents the United States internationally. Known for his power hitting, Alonso quickly became a fan favorite and broke the MLB rookie home run record in 2019. He has also won multiple Home Run Derby titles.

Sections (3)

Full Timeline Career & Achievements Success & Recognition

1900: MLB Extra-Base Hit Record

In 2019, Pete Alonso became the first player in MLB history since 1900 to record 11 extra-base hits in his first 10 career games.

1938: Mets All-Time Single-Season Home Run Leader

On August 27, 2019, Pete Alonso became the Mets all-time single-season home run leader, surpassing Carlos Beltrán and Todd Hundley. He is the first rookie to set his franchise's single-season home run record since Johnny Rizzo did it for the Pittsburgh Pirates in 1938.

1942: Grandfather's Military Service Begins

In 1942, Pete Alonso's grandfather began his military service in World War II.

1945: Grandfather's Military Service Ends

In 1945, Pete Alonso's grandfather completed his military service in World War II.

1951: Grandfather's Marriage

In 1951, Pete Alonso's grandfather married Anna (née Pirraglia).

1963: Family Moved to Ohio

In 1963, Pete Alonso's family relocated to Lancaster, Ohio.

1975: Appeared in Every Game of the Season

In 2024, Pete Alonso played in all 162 games for the Mets, making him the second player in Mets history to appear in every game in a single-season, joining Félix Millán (1975).

1976: NL Rookie of the Month Award (April)

In April 2019, Pete Alonso won the National League Rookie of the Month Award after batting .292 with 9 home runs, 8 doubles, one triple and 26 RBIs.

1976: Most Home Runs Before All-Star Break

On July 7, 2019, Pete Alonso became the second player in Mets history to hit the most home runs (30) before the All-Star break, after Dave Kingman in 1976.

1979: Lee Mazzilli homers in All-Star Game

In 1979, Lee Mazzilli became the first Met to homer in the All-Star Game.

1983: Mets Rookie Home Run Record

On June 23, 2019, Pete Alonso broke the Mets rookie home run record, surpassing the previous record set by Darryl Strawberry in 1983.

September 18, 1990: Darryl Strawberry reaches 250 home runs

On September 18, 1990, Darryl Strawberry reached 250 career home runs.

December 7, 1994: Pete Alonso's Birth

On December 7, 1994, Peter Morgan Alonso, later nicknamed "Polar Bear," was born. He would grow up to be a professional baseball first baseman for the New York Mets.

Others born on this day/year

1999: Mets' RBI Record

In 2022, Pete Alonso broke the Mets' single-season RBI record previously held by Mike Piazza (1999) and David Wright (2008) with 125.

2006: David Wright homers in All-Star Game

In 2006, David Wright became the second Met to homer in the All-Star Game.

2006: NL Rookie of the Month Award (April)

In April 2019, Pete Alonso won the National League Rookie of the Month Award after batting .292 with 9 home runs, 8 doubles, one triple and 26 RBIs.

2008: Mets' RBI Record

In 2022, Pete Alonso broke the Mets' single-season RBI record previously held by Mike Piazza (1999) and David Wright (2008) with 125.

2013: NL Rookie of the Month Award (April)

In April 2019, Pete Alonso won the National League Rookie of the Month Award after batting .292 with 9 home runs, 8 doubles, one triple and 26 RBIs.

2014: Played with Madison Mallards

In 2014, Pete Alonso played collegiate summer baseball with the Madison Mallards of the Northwoods League.

2015: Pete Alonso meets Haley Walsh

In the summer of 2015, Pete Alonso met Haley Walsh while playing in the Cape Cod collegiate summer league.

2015: Played for Bourne Braves

In the summer of 2015, Pete Alonso played for the Bourne Braves of the Cape Cod Baseball League.

2016: Signed with Mets and Professional Debut

In 2016, Pete Alonso signed with the New York Mets for a $909,200 signing bonus and made his professional debut with the Brooklyn Cyclones.

2016: Drafted by the Mets

In 2016, Pete Alonso was selected by the New York Mets in the MLB draft after playing college baseball for the Florida Gators.

2016: Junior Year at University of Florida

In 2016, during his junior year at the University of Florida, Pete Alonso showcased strong performance with a .374/.469/.659 hitting record, 14 home runs, and 60 RBIs in 58 games.

2016: NL Rookie of the Month Award (April)

In April 2019, Pete Alonso won the National League Rookie of the Month Award after batting .292 with 9 home runs, 8 doubles, one triple and 26 RBIs.

2017: Promotion to Binghamton Rumble Ponies

In 2017, after a strong performance with the St. Lucie Mets, Pete Alonso was promoted to the Binghamton Rumble Ponies.

November 2018: Pete Alonso and Haley Walsh get engaged

In November 2018, Pete Alonso and Haley Walsh got engaged.

2018: Promotion to Las Vegas 51s and All-Star Futures Game

In 2018, Pete Alonso received a midseason promotion to the Las Vegas 51s and represented the Mets in the All-Star Futures Game. He also won the Joe Bauman Home Run Award.

2019: Home Run Derby Earnings

In 2019, Pete Alonso began his winning streak at the Home Run Derby, earning $2 million over the course of 2 wins.

2019: Record-Breaking Rookie Season and Rookie of the Year Award

In 2019, Pete Alonso broke Aaron Judge's record for most home runs by a rookie in MLB history. He was later awarded the National League Rookie of the Year and named to the All-MLB Team.

2019: Pete Alonso gets his "Polar Bear" nickname

In 2019, Pete Alonso got his "Polar Bear" nickname during spring training from Mets third baseman Todd Frazier, who said he looked like a "big, damn polar bear."

2019: MLB Debut and Rookie of the Year Award

In 2019, Pete Alonso made his MLB debut on Opening Day for the New York Mets. He later won the National League Rookie of the Year Award and set a major league record for rookies with 53 home runs.

2019: MLB Debut and First Home Run

In 2019, Pete Alonso made the Mets Opening Day roster and recorded his first major league hit. On April 1st, he hit his first major league home run against the Miami Marlins.

2019: All-Star Selection and Rookie of the Month

On June 30, 2019, Pete Alonso was selected as a reserve to the 2019 MLB All-Star Game and won the NL Rookie of the Month Award for June.

September 3, 2020: First Career Walk-Off Home Run

On September 3, 2020, Pete Alonso hit his first career walk-off home run in a 9–7 victory against the New York Yankees.

2020: The Alonso Foundation is formed

In 2020, Pete Alonso and his wife formed The Alonso Foundation, a charitable organization that supports youth, veteran, and animal causes.

November 12, 2021: Pete Alonso marries Haley Walsh

On November 12, 2021, Pete Alonso married Haley Walsh at Sacred Heart Catholic Church in downtown Tampa.

2021: Second Home Run Derby Win

In 2021, Pete Alonso won the MLB Home Run Derby for the second time.

2021: Sophomore Slump

In 2021, Pete Alonso's sophomore slump led some talent evaluators to favor Dominic Smith as the team's starting first baseman heading into the 2021 season.

2021: 100th Career Home Run

On September 7, 2021, Pete Alonso hit his 100th career home run, becoming the second-fastest player to reach this milestone.

March 13, 2022: Pete Alonso involved in car accident

On March 13, 2022, Pete Alonso was involved in a car accident in Tampa, Florida. A driver ran a red light and struck Alonso's vehicle, which flipped over three times. Neither Alonso nor anyone else involved was injured.

March 22, 2022: Contract Agreement with Mets

On March 22, 2022, Pete Alonso signed a one-year, $7.4 million contract with the Mets, avoiding salary arbitration.

August 17, 2022: Alonso to join United States national baseball team

On August 17, 2022, Pete Alonso announced that he would join the United States national baseball team in the 2023 World Baseball Classic.

2022: Led the League in Runs Batted In

In 2022, Pete Alonso led the league in runs batted in (RBI), adding to his list of accomplishments in Major League Baseball.

2022: Franchise Record for RBI

In 2022, Pete Alonso played in 160 games for the Mets, batting .271/.352/.518 with 40 home runs and 131 RBIs, breaking the franchise record and tying Aaron Judge for the most RBI in the major leagues.

2022: All-Star Game Selection and RBI Record

In 2022, Pete Alonso was named to the MLB All-Star Game. On September 25, he set a new Mets' single-season RBI record with 125.

January 13, 2023: Contract Agreement with Mets

On January 13, 2023, Pete Alonso and the Mets agreed to a one-year, $14.5 million contract during the arbitration period.

2023: Alonso plays in World Baseball Classic

In 2023, Pete Alonso played in the World Baseball Classic, going 2-for-14 across five games. He started an eighth-inning rally with a base hit against Venezuela in the quarterfinals and later hit an RBI single against Cuba in the semifinals.

2023: All-Star Game Selection

On July 2, 2023, Pete Alonso was named to the MLB All-Star Game for the third selection of his career.

2023: Tied for Fourth Place on Mets All-Time Home Run List

On September 27, 2023, Pete Alonso hit his 46th home run of the season in an 11–2 win over the Miami Marlins. His 192nd career homer made him tie Howard Johnson for 4th place on the Mets all-time home run list.

January 11, 2024: Contract Agreement with Mets

On January 11, 2024, the Mets and Pete Alonso agreed on a one-year, $20.5 million contract to avoid salary arbitration.

2024: Alonso's contract with Mets expires, becomes a free agent

After the 2024 season, Pete Alonso's contract with the Mets expired and he became a free agent for the first time in his career. He declined the Mets' qualifying offer.

2024: Appeared in Every Game of the Season

In 2024, Pete Alonso played in all 162 games for the Mets, making him the second player in Mets history to appear in every game in a single-season, joining Félix Millán (1975).

2024: Inducted into Madison Mallards Hall of Fame

In 2024, Pete Alonso was inducted into the Hall of Fame of the Madison Mallards of the Northwoods League.

2024: MLB Postseason Performance

In the 2024 MLB postseason, Pete Alonso played in 13 games for the Mets, batting .273/.431/.568 with 4 home runs and 10 RBI.

2024: All-Star Game Selection

On July 7, 2024, Pete Alonso was named to the 2024 MLB All-Star Game for the fourth selection of his career.

2024: Go-Ahead Home Run in Wild Card Series

On October 3, 2024, in Game 3 the 2024 National League Wild Card Series against the Milwaukee Brewers, Pete Alonso hit a go-ahead, three-run home run to give the Mets a 3–2 lead. They would then go on to win 4–2 and eliminate the Brewers from the playoffs.

February 12, 2025: Alonso and the Mets agree to a two-year contract

On February 12, 2025, Pete Alonso and the Mets agreed to a two-year, $54 million contract including an opt-out after the 2025 season, after three months of negotiations with his agent.

2025: Alonso plays in all 162 games and opts out of contract

In 2025, Pete Alonso played in all 162 games for the Mets, slashing .272/.347/.524 with 38 home runs and 126 RBI, leading the National League with 41 doubles. On September 28, after the final game of the season, Alonso stated that he would opt out of his contract and elect free agency.

2025: Alonso named to MLB All-Star Game, hits home run

In 2025, on July 6, Pete Alonso was named to the MLB All-Star Game for the fifth time in his career. During the sixth inning, Alonso hit a three-run home run off of Kansas City Royals pitcher Kris Bubic, giving the National League a 5–0 lead, becoming the third Met to homer in the All-Star Game.