The 34-year-old right-hander threw 35 pitches with 18 strikes and walked two in a 5-3 loss to the Somerset Patriots.
He allowed a single in the first inning before former major leaguer Edwin Maysonet hit a solo homer off of him with one out in the second.
The 6-foot-8 McGrady played baseball until his senior year in high school when he transferred to a school without a baseball program. He was a seven-time NBA All-Star and won two scoring titles.
Tracy McGrady Takes The Mound
Tracy McGrady made his major league debut Saturday, pitching for the Sugar Land Skeeters.