Drabek, who began the year in the starting rotation, has been pitching out of the bullpen since being called up from Triple-A Las Vegas on Sept. 7.
The 23-year-old didn't allow a hit and walked just one batter against the Yankees on Saturday.
"An aggressive overall approach," Blue Jays manager John Farrell said of Drabek, who struck out three. "He threw curveballs for strikes, he threw curveballs to finish guys off.
"In shorter stints, the body language presents that he's not trying to manage through six or seven innings, he's attacking the strike zone and really just a more simplistic approach of attacking and letting his stuff play."
The Blue Jays felt having Drabek finish the year in Toronto was important after struggling for most of the season. He posted a 5.70 ERA in 14 starts this season with the Blue Jays and then proceeded to go 5-4 with a 7.44 ERA in Triple-A.
The move to the bullpen seems to have accomplished the turnaround, but Farrell said it's still possible that Drabek will get a start before the end of the season.
"It hinges on the physical status of other guys in the rotation," Farrell said. "If a guy needs a blow, and he's stretched out enough, we have that option available to us. But when we set out to view September, part of it was to finish on a positive note for Kyle, and that's in the making right now."