Former Lions guard Rob Sims, who started every game during his five years in Detroit, announced his retirement Sunday night.
The 31-year-old made the announcement on Channel 2 during the 11 p.m. newscast.
A fourth-round pick by the Seahawks in 2006, Sims spent four years in Seattle before the Lions traded for him in 2010.
He and center Dominic Raiola became fixtures on the offensive line the past several years and became leaders of the group.
Sims became a free agent this year, and the Lions chose not to re-sign him, instead drafting Laken Tomlinson in the first round to be the long-term left guard.