Terms of their deals are not yet known. Interest in O'Sullivan and Thomas was first reported earlier today by Matt Barrows of the Sacramento Bee.
O'Sullivan, originally drafted by the Saints, has also been on the Packers, Vikings, Patriots and Panthers. He spent last season with the Lions, Mike Martz's old team. Last season, he completed 13 of 26 attempts for 148 yards, one touchdown and 2 interceptions.
Thomas has spent four seasons with the Vikings. He has 143 tackles and 1.5 sacks during those four seasons.
Last season, Foster had 247 carries for 876 yards and 3 touchdowns with Carolina.
More San Francisco 49ers News
-
Analyst offers 49ers luxury and bargain trade options ahead of deadline
It's unclear whether the San Francisco 49ers will make another trade before the November 10 NFL trade deadline. However, the team is undoubtedly exploring its options as it looks to strengthen the roster for a potential playoff run. ESPN's Bill Barnwell recently examined... -
49ers Stock Watch: Which Players Are Trending Up and Down?
The San Francisco 49ers are off to a strong start to the 2026 season. While some players have taken advantage of increased opportunities and established themselves as important pieces of the roster, others have seen their production or playing time become a concern. With the... -
What Kyle Shanahan and others said after 49ers' 38-17 win vs. Raiders
San Francisco 49ers head coach Kyle Shanahan and players spoke with reporters after Sunday's 38-17 win over the Las Vegas Raiders. Here's what they said. Transcripts provided by the San Francisco 49ers Communications staff. 49ers Head Coach Kyle Shanahan Opening... -
49ers vs. Raiders PFF grades: Best and worst from the game, plus snap counts
The San Francisco 49ers improved their record to 7-1 after a 38-17 win over the Las Vegas Raiders in Week 9. Pro Football Focus released its grades and snap counts from the game, providing a closer look at which 49ers players stood out and who has more work to...