Mack went 1-for-4 with a homer, a run scored and a strikeout in Miami's 4-2 loss to San Diego on Friday.
Mack opened up the scoring in the second inning with a solo homer to give the Marlins the early lead. The 23-year-old now has three home runs in his past four games. On the season, the rookie is slashing .243/.298/.446 with 10 homers and 30 RBI in 194 plate appearances.