"I don't feel much different than if I would have been starting consistently. So I guess that's a good sign, and now I can build off it," Koehler said.

With this in mind, Fantasy owners in NL-only formats might want to take a look at Tom Koehler, who the team just announced will enter the rotation moving forward. Koehler is an unremarkable pitcher who is long past the age where he might be considered a prospect, but he could be useful when he pitches at home, where even well-hit balls tend to die at the warning track.

In 24 2/3 innings at the major-league level, mostly in relief, Koehler has 22 strikeouts and eight walks, with a 4.38 ERA. If he could simply sustain that as a member of the rotation, he might be worth sticking into your NL-only lineup when the Marlins play at home. 

Koehler has posted a 3.18 ERA, 0.97 WHIP and 9:6 K:BB ratio in 11 1/3 innings over six relief appearances with the Marlins this season. He made three starts in Triple-A before being recalled, allowing just two earned runs on seven hits and 10 walks in 17 innings while striking out 14.

Koehler posted a 4.17 ERA in 27 starts for Triple-A New Orleans in Miami's system last season with a 2.3 K/BB. In his first three starts at New Orleans this season, Koehler has allowed just three runs (two earned) on seven hits with 14 strikeouts over 17.1 innings, but he has walked 10 batters.