Why would the Patriots be working out Pitt's quarterback before the draft?

It sure sounds like the Patriots aren't parting ways with Jimmy Garoppolo so why would they be working out quarterbacks before this year's draft? In all likelihood, the Patriots are simply doing their homework on a player who has received notable buzz in the weeks leading up to the draft as one of the undervalued players at the game's most important position. With Tom Brady, Garoppolo and Jacoby Brissett on the roster it seems unlikely they would invest in another body at that spot. But considering that in 2017 the Patriots will have a 40-year-old starter and a backup in a contract year, maytbe it's not completely out of the realm of possibility that they grab an additional signal-caller.

Source: Yahoo.com