SCOTTSDALE, Ariz. -- Stretched out to four innings for the first time this spring, D-backs right-hander Brandon McCarthy admitted he felt tired during his outing Friday, but was happy for the experience as he continues building up toward the regular season.
"It was just a tough day energy-wise," he said. "Early on I was completely out of synch, I didn't feel good mechanically. Then the middle two innings, I was able to adjust and get back to where I needed to be and then in the fourth inning, I was kind of just going along, and I hit a wall and got dead tired.
"Overall, it was just kind of a weird day, but I'm glad I was able to make an adjustment and it'll give me a chance to work on some things this week."
In his four innings of work against his former team, the A's, McCarthy surrendered two runs on three hits and two walks.
Both runs came in the fourth inning when the right-hander issued a two-out walk, then gave up back-to-back RBI doubles.
"I was really sort of laboring and I couldn't get back in my rhythm," McCarthy said. "In the regular season when that happens you can still turn it into a six- or seven-inning outing, but here in spring, you just get tired quicker. You don't have that game condition to push through."
McCarthy did, however, strike out six batters to up his Spring Training total to 16. He credited most of the swings and misses to his changeup, his newest addition to his pitching repertoire.
"I felt like I was able to do some things I wanted to do with it," he said of the changeup. "I was able to set a lot of guys up with it today. It creates a new layer for me."
The 29-year-old said he threw the pitch at least 10 times Friday and he hopes to at least use it 10 to 15 percent of the time once the regular season begins.
Like McCarthy, D-backs manager Kirk Gibson felt that despite the pitcher's struggles, Friday was good for his progress moving forward.
"It's a good game for him to get under his belt," Gibson said. "It'll push him a little bit for his next start."
Tyler Emerick is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.