Callahan was a driving force in the offense as Colchester opened the Division I playoffs with a pair of one-sided wins, 23-0 over Champlain Valley on May 29 and 16-0 over Middlebury two days later in the quarterfinals. While ace pitchers Riley Magoon (perfect game against CVU) and Ali Sheets (no-hitter vs. Middlebury) dominated in the circle and at the plate, Callahan contributed to the high-powered offense with a pair of runs batted in against CVU and a home run and two singles against the Tigers, scoring four runs.