BUFFALO, NY -- Frank Thomas had another 1-for-4 day for the Charlotte Knights, who fell to the Buffalo Bisons, 12-4, Sunday afternoon in International League play.

Thomas (6-for-23) has played six games in his scheduled 20-day rehab assignment with the White Sox Triple-A team.

In the seventh inning, Thomas was behind in the count, 0-2, when Buffalo starter Francisco Cruceta tossed him a 90-mph fastball low and away that Thomas stroked into left field for a single

His first two at-bats of the game saw Thomas ground out to the third baseman in the second and go down swinging on a full count in the fourth.

Thomas' last at-bat came in the ninth with one out and runners at the corners. Once again behind in the count, 0-2, Thomas popped out to the shortstop.

"From a groove standpoint, when you almost miss a year, you lose a lot in this game," said Thomas.

"Hitting is really (about) timing, watching release points and spending a lot of time in that cage. All that was backed up for me and I really didn't get a chance to do that until late March, early April."

When asked about the White Sox's philosophy regarding small ball and manufacturing runs, Thomas said he isn't concerned about his role in that style of play.

"I'm not that type of hitter and I'm not worried about being that type of hitter," Thomas said.

"You've got to have one of those guys in your lineup who can just bang. Fortunately, we have two, and that's me and Paulie (Konerko)."

Thomas was the designated hitter and hit in the cleanup spot. His swing is still a work in progress at this point, but he seemed to move much better compared to Saturday, and was able to run harder.

He is expected to get the day off on Monday because it is Kids' Day, with the first pitch scheduled for 10:35 a.m. ET.