The San Francisco 49ers’ rotating cast of safeties in 2018 couldn’t produce a surefire starter at either safety spot. Finding stability in the back end of the secondary could be key to improving a 15th-ranked passing defense that posted an NFL record worst two interceptions last season.

The safety position is deep in this year’s free agency class. Finding one that fits in the defense will be important for general manager John Lynch – who was a Hall-of-Fame-caliber safety during his playing days. Here are six players the 49ers should consider at the position in free agency:

Earl Thomas

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Thomas might be the best fit out of the safeties on the market because of his familiarity with the 49ers’ defense. They run the same scheme that made Thomas a three-time All-Pro and a six-time Pro Bowler at free safety.

There are a couple red flags. He is entering his age-30 season, and is coming off a broken leg that held him to just four games played in 2018. However, he was excellent in those four games with three interceptions, and a Pro Football Focus overall grade of 91.3. Thomas is one of the best to ever play the position, and would be a great addition to any secondary in the NFL. His familiarity with the 49ers’ scheme and his relationship with Richard Sherman make San Francisco an ideal landing spot for him.