"A changeup is a slower pitch, so I always thought you had to slow your arm action down and throw it differently," Reed said. "When it got good, that's when I started to throw it as hard as I could and let the grip do everything.
"Once I started doing that, it got more comfortable. The more I throw it, the more comfortable I get."
Reed, who became just the second pitcher in baseball history to record a save in each of his first three career appearances against the Yankees (joining Boston's Lee Smith in 1988), finished off the Yankees for save No. 23 by using that changeup Wednesday. He fanned Nick Swisher and Mark Teixeira with the pitch.
Although he has relied on his fastball and slider during his rookie season, the changeup is quickly gaining ground in Reed's repertoire.
"Honestly, I'd say changeup and slider are almost even," said Reed, whose string of eight straight saves was snapped Friday when he gave up two runs during a six-run Seattle ninth. "The next goal is to get all of my pitches even at No. 1.
"It kind of just all depends on the situation, the hitter. It's not just going to be lefties only getting changeups and fastballs. It depends on what their weakness is and the scouting report we have on them. I can throw all three of those pitches, lefty, right, doesn't matter."