Jacob Anthony deGrom (born June 19, 1988) is an American professional baseball pitcher for the Texas Rangers of Major League Baseball (MLB). He has previously played in MLB for the New York Mets.

DeGrom began playing baseball as a shortstop and was converted into a pitcher during his junior year at Stetson University. The Mets selected him in the ninth round of the 2010 MLB draft and he made his major league debut with them on May 15, 2014. That same year, deGrom was named the National League's (NL) Rookie of the Month twice, and the NL Rookie of the Year. In 2015, 2018, 2019, and 2021 deGrom was selected as an MLB All-Star. In 2018, deGrom was the NL leader in earned run average and won the Cy Young Award. In 2019, he led the NL in strikeouts and won the Cy Young Award for the second year in a row. In 2020, he again led the National League in strikeouts. DeGrom signed with the Rangers on a five-year deal in 2023 and was named an All-Star again in 2025.

As of the 2025 season, deGrom has the lowest career WHIP and the second lowest earned run average of any starting pitcher in the live-ball era (min. 1000 IP).

Jacob Anthony deGrom was born on June 19, 1988, in DeLand, Florida. DeGrom attended Calvary Christian Academy, a small school in Ormond Beach, Florida, where he played for the school's baseball and basketball teams. As a basketball player, he was voted the District 9 Class 1A player of the year by the Florida Athletic Coaches Association and selected to the all-state third team for Class 1A.

As a senior baseball player the Florida Sports Writers Association named deGrom to the All-Florida second team. He also played American Legion Baseball, where he was noticed by the coaches for the Stetson Hatters, the college baseball team of Stetson University.

After not being selected in the Major League Baseball draft out of high school, deGrom enrolled at Stetson and played for the Hatters. He was exclusively a shortstop during his freshman and sophomore seasons. Though he was considered a good fielder with a strong throwing arm, deGrom was a light hitter with a career .263 batting average. He made his first appearance as a pitcher in May 2009. In the summer of 2009, between his sophomore and junior years, deGrom pitched collegiate summer baseball for the DeLand Suns of the Florida Collegiate Summer League. He initially made 5 pitching appearances, allowing 0 earned runs and struck out 6 batters across 6.1 innings. However, his time with the Suns was interrupted due to a dispute as to what position he would play. "Well, then I’m not gonna play then if I don’t play shortstop," stated deGrom to the Suns' manager, Davey Johnson.

When deGrom returned to Stetson that fall, the team used him as a relief pitcher, filling the role of their closer, in addition to playing shortstop. He quickly became one of Stetson's best pitchers, so the team moved deGrom into their starting rotation midway through the season. In addition to a fastball, deGrom learned to throw a changeup and a slider. Major league scouts began to take notice of deGrom when he pitched against Chris Sale of Florida Gulf Coast University. In the game, deGrom hit his only home run of the season against Sale. He made 12 starts for the Hatters, pitching to a 4–5 win–loss record with a 4.48 earned run average (ERA).

The New York Mets selected deGrom in the ninth round as a pitcher, with the 272nd overall selection, of the 2010 Major League Baseball draft. He signed with the Mets, receiving a $95,000 signing bonus. The Mets assigned deGrom to the Kingsport Mets of the rookie-level Appalachian League where he made six starts before he was diagnosed with a partial tear of the ulnar collateral ligament (UCL) in his pitching elbow. He attempted to rehabilitate his arm for four months but underwent Tommy John surgery to repair the UCL in October. He did not pitch in 2011 while he recovered from the surgery. While rehabilitating, deGrom worked on his changeup with Johan Santana.