JACKSONVILLE, Fla.—The Jacksonville Jaguars are, at the very least, no longer the NFL’s most irrelevant franchise. Urban Meyer. Trevor Lawrence. Tim Tebow. The rebuilding Jaguars now have three of college football’s biggest stars—and two of its most polarizing figures—from the past 15 years after Tebow signed a one-year contract Thursday. The former Florida standout and 2007 Heisman Trophy-winning quarterback will attempt to revive his pro career as a tight end. The 33-year-old Tebow is returning to the NFL after five years (2016-20) in the New York Mets’ organization and he’s reuniting with Meyer, his college coach, for the first time since his senior year in 2009. “I know it will be a challenge, but it is a challenge I embrace,” Tebow said in a statement. “I am dedicated to taking the direction of our coaching staff and learning from my teammates. I appreciate everyone’s support as I embark on this …