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Jay Cutler, QB, Chicago Bears
Jay Cutler's high-ankle sprain continues to mend, and all the while, backup quarterback Josh McCown continues to explode past expectations in his absence.
High-ankle sprains involve injury to one or more ligaments that connect the tibia to the fibula, and as such, rehab is much trickier than the low-ankle counterpart.
That said, head coach Marc Trestman said Cutler will take the reins of the offense once medically cleared, according to ESPNChicago.com's Jeff Dickerson.
Lamar Miller, RB, Miami Dolphins
According to ESPN.com's James Walker, Lamer Miller suffered a concussion Week 14.
As with all concussions, Miller must pass the concussion protocol. A return to full practice by Friday would bode well for Week 15; anything less suggests the running back will sit out on Sunday.
Percy Harvin, WR, Seattle Seahawks
Percy Harvin had a cortisone injection in his surgically repaired hip last week. Cortisone is a steroid that reduces inflammation—and therefore pain.
Despite a brief-but-strong return earlier this season, details on Harvin's status remain scarce. Practice injury reports should help clarify things a bit, but rumors that the Seahawks may shut him down until the playoffs are gaining steam.
Peyton Manning, QB, Denver Broncos
The health of Peyton Manning's ankles comes up just about every week, but he just doesn't seem to care.
As the saying goes, that one's gonna hurt in the morning. Er, offseason.
Randall Cobb, WR, Green Bay Packers
At this point, with the Packers on the outside of the playoff picture looking in, fans may not see Randall Cobb on the field again in 2013.
That said, Ty Dunne of the Milwaukee Journal Sentinel reported last week that according to head coach Mike McCarthy, Tuesday is a "big day" in terms of Cobb's future availability.
Tyrann Mathieu, DB, Arizona Cardinals
According to Fox Sports 910's Mike Jurecki, Tyrann Mathieu suffered a torn ACL and LCL. Like Gronkowski, he will need reconstructive knee surgery, and his availability for Week 1 of the 2014 season may be in jeopardy.
Dr. Dave Siebert is a resident physician at the University of Washington and a member of the Pro Football Writers of America. He plans to pursue fellowship training in Primary Care (non-operative) Sports Medicine.
For questions about players not on this list, follow Dave on Twitter: