The 49ers on Wednesday re-signed one of their unrestricted free agents for depth in the defensive backfield, the club announced.

One day after a reported a deal with another veteran safety fell through fell through, the 49ers re-signed defensive back Antone Exum, who appeared in two games late last season and started one game.

Exum, 27, appeared in 27 games with two starts for the Minnesota Vikings in 2014 and ’15. He signed with the 49ers on Nov. 7 after the secondary experienced a rash of injuries.

On Tuesday, ESPN’s Adam Schefter reported former Dallas and Pittsburgh safety J.J. Wilcox was signing with the 49ers. He later reported Wilcox “flipped” and would instead join the New York Jets.

The 49ers needed more depth at safety for next week’s three-day mandatory minicamp. Marcell Harris (Achilles), Don Jones (knee) and Chanceller James (knee) are not available to practice as they continue rehabilitation from surgeries.

Eric Reid, who has played all five seasons of his NFL career with the 49ers, remains as a free agent. The club projects Jaquiski Tartt and Adrian Colbert or Jimmie Ward as the starting safeties.

The 49ers do not appear willing to pay more than the minimum salary for players who are being brought onto the 90-man roster to supply depth.