Panthers: Offensive line injury replacement options

GLENDALE, AZ - OCTOBER 06: Center Ryan Kalil (Photo by Christian Petersen/Getty Images)
GLENDALE, AZ - OCTOBER 06: Center Ryan Kalil (Photo by Christian Petersen/Getty Images) /
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Dallas Cowboys v San Francisco 49ers
SANTA CLARA, CA – AUGUST 23: Tackle Joe Staley #74 of the San Francisco 49ers waits for the snap against the Dallas Cowboys during a preseason game on August 23, 2015 at Levi’s Stadium in Santa Clara, California. The 49ers won 23-6. (Photo by Brian Bahr/Getty Images) /

Alex Boone, G

Outside of the locker room, free agent guard Alex Boone remains available after playing out his one-year contract with the Arizona Cardinals last season. Another former undrafted free agent signee out of college, Boone played six seasons for the 49ers and one in Minnesota before starting 13 games at Arizona last year.

At 31 years old, Boone is obviously in the latter part of his career and may retire if not provided a chance with another NFL team. The fact he remains a free agent at this stage of the process is a bit alarming but he could provide NFL experience, something many other options will lack.