"I think right now at this point it's just like going through Spring Training again," Mitchell said. "You just have to get the reps in. You get the sim game and then a couple [rehab] games. It's just pretty much the throwing progression."
Mitchell will have one more bullpen session, then hopes to start a rehab assignment late next week. He thinks the rehab will take less than the 30 days and said his foot currently feels as good as ever.
The right-hander has a 5.31 career ERA in 40 2/3 innings over two seasons. He saved one game for New York in 2015 and has 36 strikeouts compared to 19 walks.
Mitchell has thrown two bullpens so far, and this was his second simulated game. It was supposed to be a two-inning game, but heavy rains after the first inning cut it short.
"Anytime you're watching the team, whether they're doing good or bad, you're going to wish you were playing," Mitchell said. "If it was up to me, I would have been there the whole time."
Sam Blum is a reporter for MLB.com based in St. Petersburg. This story was not subject to the approval of Major League Baseball or its clubs.