Callihan attended Providence School in Jacksonville, Florida, where he began starting on their varsity baseball team as an eighth grader.[1] In 2018, as a junior, he hit .440 with 11 home runs.[2] As a senior in 2019, he batted .456 with 12 home runs and also pitched to a 1.08 ERA over 26 innings.[3]
Callihan also played for the U.S. national under-18 team at the 2018 Under-18 Pan-American Championship. He was named to the All-Tournament team as a first baseman after batting .529 with five doubles in nine games. He also pitched, striking out five batters in three innings.[4]
Professional career
Cincinnati Reds
The Cincinnati Reds selected Callihan in the third round with the 85th overall selection of the 2019 Major League Baseball draft.[5][6] He signed for $1.5 million, forgoing his commitment to play college baseball for South Carolina.[7] Callihan made his professional debut with the Greeneville Reds and was promoted to the Billings Mustangs at the end of August.[8][9] Over 57 games between the two teams, he batted .263 with six home runs, 33 RBI, and 11 stolen bases.[10] Callihan did not play in a game in 2020 due to the cancellation of the minor league season because of the COVID-19 pandemic.[11]
Callihan opened the 2021 season with the Daytona Tortugas.[12] After 23 games in which he hit .299 with two home runs, he suffered a right elbow injury and missed the remainder of the season.[13] After missing the beginning of the 2022 season while recovering from injury, he returned in mid-May with the Tortugas and hit a home run in his first at-bat.[14] In late June, he was promoted to the Dayton Dragons.[15] Over 88 games between the two teams, Callihan batted .250 with seven home runs, 33 RBI, 19 doubles, and 15 stolen bases. Callihan played the 2023 season with both Dayton and the Double-A Chattanooga Lookouts, hitting .249 with nine home runs, 58 RBI, and 29 stolen bases over 131 games.[16]
Callihan spent the 2024 campaign back with Chattanooga and also had a four-game stint with the Triple-A Louisville Bats. In 69 games for Chattanooga, he slashed .271/.345/.413 with eight home runs, 25 RBI, and 21 stolen bases. Following the season, the Reds added Callihan to their 40-man roster to protect him from the Rule 5 draft.[17]
The Reds optioned Callihan to Triple-A Louisville to begin the 2025 season.[18] On April 30, 2025, Callihan was promoted to the major leagues for the first time.[19] Callihan recorded his first hit and run batted in on May 3, in a game against the Washington Nationals.[20] While facing the Atlanta Braves on May 5, Callihan fractured his left forearm colliding into an outfield wall.[21][22] He was initially placed on the 10-day injured list, but transferred to the 60-day after the brunt of his injury was shown. At first, Callihan was expected to miss two months of the regular season recovering from the injury.[23][24] However, on July 11, Callihan underwent a follow-up surgery, and it was announced that he would likely miss the remainder of the season.[25]
