The Titans' starting quarterback is still recovering from Lisfranc repair surgery on his right foot, but the boot he was in for about four months is gone. And he's doing stuff that wasn't expected at this stage.
"Being able to put explosive force on it, to kind of jump back and forth and lunge back and forth, was something we thought we wouldn't get into until the end of this week or next and we were able to do it last week," Locker said. "Not only we were able to do it, but the foot wasn't sore to the point where I couldn't do anything the next day.
"It's responded really well day after day to the treatment that we've done."
Quarterbacks can throw to receivers at this stage of the offseason, and Locker said while he won't be dropping back he will be making throws.
Part of the rehab focus has been on making sure he doesn't develop bad habits by throwing with bad form to compensate for the limitations of the foot.
Locker agreed with the premise it's a make or break season for him, but he said that's the case for most players most years.
"You're paid to play this game, you've got to be productive and you've got to play," he said. "I think we all understand that. Certainly that position with Jake, you want to have stability, you want to have someone you know can do that. Jake is going to have the opportunity to show he can do that.
"I like what I've seen on the tape. He's exhibited qualities of things that I think are important at the position. But he's got to do that in this offense. That's what spring, that's what OTAs, that's what training camp practice is all about."