But the Rangers right-hander is not worried. He has 3 1/2 weeks to get it right.
On Thursday, Feldman was charged with three runs on five hits in 2 1/3 innings in his club's 16-5 victory against the Rockies at Hi Corbett Field. The 2009 Rangers Pitcher of the Year walked two batters and struck out three.
"It's a good thing it's the spring and I can get it out of the way now," said Feldman, who is on track to start the second game of the season against Toronto on April 7.
Feldman entered the game with the Rangers up by four runs and struck out Dexter Fowler to start the bottom of the first. But the next hitter, Mike Paulk, hit a triple. One out later, Brad Hawpe hit a double and Chris Iannetta hit an RBI single to cut the Rangers' lead in half, 4-2.
In the second frame, Feldman struck out Ryan Spilborghs to start the inning. He walked Omar Quintanilla and Fowler as the Rangers escaped the inning unscathed.
Feldman struck out Melvin Mora to start the third inning but Hawpe and Iannetta stung him again with another double and a single to end his afternoon. Clay Rapada replaced Feldman and struck out Ian Stewart.
Feldman finished with 57 pitches, including 35 pitches for strikes.
"I thought he was very good," Rangers manager Ron Washington said. "They worked him pretty good in that inning. He just got over his pitch count. We just didn't want to push him too much. We could have left him out there to get out of that inning."
Afterward, Feldman said the mechanics on his delivery were inconsistent and that's the primary reason he could only throw his fastball for a strike. He and pitching coach Mike Maddux will work on his refining his delivery Friday.
In his first Cactus League outing, Feldman gave up one run on three hits in two innings for the loss against the Royals on Friday. He struck out one batter that game.
"Obviously, I would like to see better results and get through my three innings," he said. "My pitch count got a little up there. There are some things I can take from and work on for my next start."
On offense, the Rangers racked up a 23 hits, including seven doubles. Pedro Borbon, Nelson Cruz, Chris Davis, Taylor Teagarden and Elvis Andrus each drove in at least two runs. Davis finished 4-for-4 with a home run and two runs scored, and Andrus went 4-for-5.
"We got a dangerous lineup and everybody on our offensive side knows that," Feldman said. "All of us pitchers see it. It's always good to see different guys get hits."
Jesse Sanchez is a national reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.