In the Colts' preseason opener on Thursday against the Baltimore Ravens -- Warren's in-game NFL debut -- he caught all three of his targets, for 40 yards (13.3 avg.), including a 23-yarder in which he showed off his run-after-catch ability.

Warren was targeted three times, all of which he caught, for 40 yards, earning an impressive 83.0 receiving grade from Pro Football Focus. He proved his reliability, which as a quarterback, Jones appreciated.