The quiet middle infielder barely cracked a smile after his solo shot off Yankees reliever Cory Wade in the eighth inning of a 6-3 loss.
"He didn't really smile much, but I think he was happy," Gardenhire joked. "So it was nice to see."
The Twins aren't expecting too much power from Florimon, as his career high in homers in the Minors is nine, set back in 2009 while with the Orioles organization.
But the 6-foot-2 shortstop should have enough power to keep opposing pitchers honest, according to Gardenhire.
"He's got a big enough frame that he can pop one every once in a while," Gardenhire said. "But he needs to hit line drives and first figure himself out as a hitter at this level. So we'll look for consistency first, and maybe the power will come later."