What happened: The former Miami Dolphins star sustained significant damage to his ACL, MCL, PCL, and patella last September. Bleacher Report’s James Palmer reported there is no guarantee Tyreek Hill will play during the upcoming campaign. The free-agent receiver currently remains without a team while navigating his extended rehabilitation.

Why it matters: Hill’s elite speed is his defining trait, making his recovery from a severe joint injury a critical concern for prospective suitors. Any lingering physical limitations will severely impact his open-market value. Medical experts initially projected a midseason return, but organizations require evidence of full-speed capability in drills before extending a contract.

What to watch: Contenders will evaluate the receiver's on-field progress later this fall. He is expected to be a highly coveted addition if he demonstrates his pre-injury form.