Parker played junior college baseball at San Jacinto College. He posted a 6–0 record with 111 strikeouts and a 1.54 ERA in 64+1⁄3 innings over 13 starts in his freshman season.[2] Parker was selected in the 27th round of the 2019 Major League Baseball draft by the Tampa Bay Rays, but decided to return to San Jacinto for a second season.[1] In his sophomore season, Parker went 5–0 with a 1.19 ERA and 64 strikeouts in 30+1⁄3 innings pitched over six starts before the season was cut short due to the coronavirus pandemic.[3]
Professional career
The Washington Nationals selected Parker in the fifth round of the 2020 Major League Baseball draft.[4] He signed with the team on June 23, 2020, and received a $100,000 signing bonus.[5] Parker was assigned to the Fredericksburg Nationals of Low-A East to start the 2021 season.[6] He was promoted to the High-AWilmington Blue Rocks on July 13, 2021, after going 3–7 with a 4.08 ERA and 85 strikeouts over 57+1⁄3 innings pitched with Fredericksburg.[7] Parker finished the season with a 4–12 record and a 4.87 ERA with 144 strikeouts in 101+2⁄3 innings pitched.[8]
On November 14, 2023, the Nationals added Parker to their 40-man roster to protect him from the Rule 5 draft. He was optioned to the Triple–A Rochester Red Wings to begin the 2024 season.[9] On April 15, 2024, the Nationals promoted Parker to the major leagues for the first time, optioning Amos Willingham to Triple-A to making room for the former on the active roster.[10] Parker was named the starting pitcher against the Dodgers on Jackie Robinson Day in his debut. He logged 5 innings, three strikeouts, and recorded the win. In his second-career outing, Parker started a home game against the Astros. He pitched for 7 innings, recorded 8 strikeouts, and did not let up a single run.