The Rockies began tweaking their rotation and bullpen Thursday.

The club optioned struggling right-hander reliever Carlos Estevez to Triple-A Albuquerque and reinstated left-handed starter Tyler Anderson off the disabled list.

Then Anderson pitched the ninth inning in relief in the Rockies’ 10-3 loss to Arizona. He struck out the side after allowing a leadoff walk.

“It was weird, getting loose … then there are couple pitching changes and then you end up throwing 45 pitches down there,” said Anderson, who had not pitched out of the bullpen since 2010 when he was at the University of Oregon.

Now the question becomes, what does the club do with Anderson for the long-term? He is officially listed as a starter, but he could also see time in the bullpen going forward.

“I’m sure we are going to do something, but I don’t know for sure what. But we have a lot of options, which is a good thing,” said Anderson, who said his swollen and sore left knee has fully healed.

Anderson said the Rockies have not told him what his role will be, but there could be tweaks in the rotation as the Rockies head to Los Angeles on Friday for a critical three-game series against the Dodgers.