Mathis' first homer this spring accounted for the other run off Smyly, who paid for the homers, but could've fared worse after giving up eight hits over five innings. Reed Johnson's fifth-inning double to left was the only other extra-base hit he gave up, but Stanton converted it with one of the deepest drives in the current configuration of the ballpark.
"Sometimes I don't watch it," Smyly said of the Stanton homer, "but that one I was like, 'Let's see how far this one's going.' I looked up and I thought it was going to go over the light pole. It puts a damper on my day for the last inning, but at the same time, I thought I battled pretty well."
The drive sailed just to the left of the center field batter's eye, landing on the other side of the berm that separates the stadium from the Al Kaline practice field.
The homers provided an early lead for Marlins starter Jacob Turner, who lost out to Smyly in the bid for Detroit's fifth starter's spot in 2012 before he was traded to Miami later that year. Turner retired the first 11 batters he faced until Miguel Cabrera walked. Detroit's first hit didn't arrive until Austin Jackson sent a ground ball through the left side for a leadoff single in the fifth.
Jackson's steal of second base and Alex Avila's bloop single set up a run when Casey McGehee couldn't handle Bryan Holaday's grounder to third. Turner regrouped to retire new Tigers shortstop Andrew Romine on a double play to end the threat.
Turner stuck out five Tigers over six innings of three-hit ball, continuing his solid spring.
Up next: Tom Koehler's next shot to try to win a rotation spot could come Monday, when the Marlins return to Roger Dean Stadium for a 1:05 p.m. ET game against the Nationals. Koehler hasn't officially been announced as the starter, but appears likely to get the assignment. Marcell Ozuna, who left Sunday's game against the Tigers with a cramp in his left leg, could return to action if he's cleared Monday morning. Taylor Jordan is scheduled to make the start for the Nationals. The game can be heard live on Gameday Audio.
Jason Beck is a reporter for MLB.com. Read Beck's Blog and follow him on Twitter @beckjason. This story was not subject to the approval of Major League Baseball or its clubs.