That the news was first reported by NFL Network.
A source told ESPN that the Rams would talk options for its 10-year veteran with Sullivan to stay with the company in some capacity.
Brian Allen, also a fourth-round pick from Michigan State at 2018, is expected to take over as starter.
Last week , the Rams were the only team from the NFL to begin the same five players on the line through 16 matches, but turnover this offseason was expected.
Left tackle Andrew Whitworth, 3-7, mulled retirement, but recently announced that he would return for the last season of his eponymous contract and 14 th season as a pro. The perfect side of this line, including tackle Rob Havenstein and guard Austin Blythe, is expected to remain intact.
Second-year pro Joseph Noteboom, a third-round pick from TCU, can slide into the spot in left guard when Saffold signs everywhere.
Noteboom and allen received a number of practice reps season because of Whitworth remaining programs and Sullivan, as the Rams advanced to superbowl LIII, but both rookies played on offense.
The Rams initially signed Sullivan to a one-year deal in 2017 after he played the prior season for its Washington Redskins, at which McVay served as offensive coordinator.
Sullivan’s ability to diagnose a shield and communicate with all quarter back Jared Goff proved invaluable.
Sullivan returned last season and started every game as the Rams appeared at the Super Bowl for the first time as the 2001 season and won another successive division title.
The Minnesota Vikings selected Sullivan in the sixth round (187th overall) of the 2008 draft. He started 93 of 96 matches and played seven seasons, but has been sidelined to the 2015 season because of back problems.