Howard had just three hits in his last 17 at-bats before homering to the opposite field with one out in the third to tie it at 1. It was the second homer of the season for Howard.
Gwynn started in center field in place of Ben Revere for the third straight game and had three hits. Revere struck out swinging in the seventh as a pinch-hitter.
The Phillies, who entered leading the NL with 43 bases on balls, walked six times against three Marlins pitchers.
NOTES: Hall of Fame third baseman Mike Schmidt debuted in the Phillies broadcast booth during the game. Schmidt will serve as a color analyst on Sunday home games this season. ... Prior to the game, the Phillies optioned RHP Justin De Fratus to Triple-A Lehigh Valley and recalled RHP Luis Garcia. De Fratus allowed four runs in five innings (7.20 ERA) over four games this season. ... Phillies RHP Roberto Hernandez (1-0, 4.35) opposes Atlanta RHP Ervin Santana (1-0, 0.00) when the teams open a four-game series in Philadelphia at 7:05 p.m. Monday. ... Marlins LHP Brad Hand (0-0, 3.24) faces RHP Jordan Zimmerman (0-0, 8.10) Monday. ... Philadelphia 3B Cody Asche went 0 for 2 and is hitless in 10 at-bats.