"I wasn't performing as a starter," Tomlin said on Wednesday. "I wasn't performing up to my expectations or the team's expectations. Every fifth day, you don't know what you're going to get out there. It's kind of tough to put that burden on the team.
"No one is more upset about it than I am, but it's the reality of the game. It's a business and that's the kind of stuff that needs to be done if you want to win."
Tomlin was one of Cleveland's most consistent starters a season ago, when he tied for the team high in wins (12) and finished with a 4.25 ERA. This season, the right-hander has struggled to command the strike zone, and he has not featured the changeup that was so effective last year.
This season, Tomlin has gone 5-8 with a 5.81 ERA in 18 appearances. The pitcher had gone 2-5 with a 7.02 ERA in his last eight starts, necessitating the move to the bullpen, where Tomlin will stay for the foreseeable future.
"I think that he can be very helpful here out of the 'pen for us," Indians manager Manny Acta said. "It's something in the past a lot of people had envisioned him doing if he didn't pan out as a starter up here. That's not to say that he's not going to start again.
"But, for the rest of the season, unless we're pressed into some type of emergency, he's going to continue to pitch out of the 'pen for now."