INDIANAPOLIS -- Sam Bradford, Robert Griffin III, Kirk Cousins and Colin Kaepernick won't be the only NFL quarterbacks sparking conversation at the NFL combine this week.

Add Bucs backup Mike Glennon to that list.

Multiple teams are expected to inquire about trading for Glennon if they haven't already, according to a source. Only one problem with that, though.

"I'm not going to give Mike Glennon up, I'll just tell you that," Bucs general manager Jason Licht said Wednesday.

The Bucs value Glennon and are not shopping him. In fact, they seem happy to keep him even if there's risk in losing him to free agency in the 2017 offseason, after which the Bucs would get a compensatory pick. Of course, they could always re-sign him.

But expect outside interest to intensify in Indianapolis nonetheless.

Glennon, a third-round pick from 2013, is due $1.542 million in 2016 base salary in the final season of his four-year rookie contract. In 19 career games (18 starts), Glennon has acquitted himself well with 4,025 yards, 29 touchdowns and 15 interceptions. Glennon didn't see action in 2015, as Jameis Winston took over the offense. But good backups are invaluable, and the Bucs know it.

"You saw what happened last year with some teams when some starters went down and didn't perform as well as they hoped," Licht said. "I feel very, very fortunate right now that we have him on our roster. I feel we have two starting quarterbacks."

As for Glennon's future, Licht said he'd prefer to keep him for the long term but recognizes competitive and talented guys want a chance to start, which Glennon won't get in Tampa.

"In the short term, right now, I feel very comfortable with him being on our roster," Licht said. "We will see how it goes."