Cameron Maybin is anxiously waiting to pick up where he left off.

Since his third-inning exit from a strained left calf on June 21 against the Astros, Maybin has missed 15 straight games. But he feels on the cusp of a rehab assignment and inching closer to the Yankees’ lineup.

Maybin ran outside for the first time on Saturday, but has been working out on the treadmill over the last week. He and manager Aaron Boone are ready to take his recovery to the next level.

“This week, we’ll start ramping up the baseball activities and obviously today is a big step for him, getting outside and doing some form running and stuff,” Boone said Saturday before the Yankees fell 2-1 to the Blue Jays in The Bronx. “We’ll see how this weekend and now this week starts to unfold, and then we’ll get a game plan for when he can get back in the game.

“It’s gone pretty well, even he — for being a fairly significant strain — a few days after I remember talking to him and him saying ‘I feel pretty good. I heal up well.’ ”

The righty outfielder was raking before he landed on the IL, registering multi-hit showings in half of the last 12 games he played. Besides Maybin’s athleticism, Boone is looking forward to returning a dynamic, defensive player who battles at the plate back into his playing cards.

In 42 games, Maybin hit .314 with a .391 OBP. He registered 14 RBIs and hit five homers, four of which he hit in consecutive games from June 15-18 just before his injury. Despite playing nearly half as many games as Brett Gardner, Maybin is right behind him with six stolen bases.

The 32-year-old is hoping for a short rehab assignment.

“It’s very difficult [to be patient], but just trusting these guys playing,” Maybin said. “Seen a lot of guys get hurt this year, I understand where they are as being precautious. Just trying to trust it, I feel pretty good though.”