Tallet allowed four runs in five innings in taking the loss against the Los Angeles Angels on Saturday and said afterward that he has had some soreness in his forearm.
Gaston said on Sunday that Tallet never complained about it during his 88-pitch start, in which he retired his final seven batters.
Asked if it were anything to be concerned about, Gaston said, "I hope not. ... we'll see how he feels and go from there."
After the game, Tallet said that he did not have command of his cutter. Gaston said the forearm soreness was not the reason Tallet came out of the game after 88 pitches; rather, it was how hard he had to work during his five innings.
"He worked hard. He didn't complain to me about it during the game," Gaston said.