Luis Severino is frustrated with the way the New York Yankees have handled his return from the strained lat muscle he suffered during the final week of spring training.

Severino will begin a rehab assignment this week, despite feeling he was ready last week. The Yankees changed their minds on starting his rehab clock and had him throw another simulated game on Friday in Tampa instead.

"I think it was unnecessary not to throw in Low-A, but I do whatever they tell me to do," Severino said.

A few days after the injury happened in late March, Severino said he hoped to only miss three or four starts.

Instead, Severino will have missed at least nine or 10 starts by the time he returns in late May, if everything continues to go as planned.

"At the end, if I'm the only one who wants something and they don't agree with that, they're not going to let me do something," he said. "But hopefully, for now on, they trust me more and try to let me compete more."

Severino hopes to only need two rehab starts, which Aaron Boone said would be the minimum, before rejoining the Yankees' rotation.