After four seasons with coach Jim Harbaugh, including a Super Bowl appearance, the 49ers moved on to Jim Tomsula. (USATSI)
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The 49ers have undergone one of the biggest overhauls in the NFL over the past calendar year.
Stay up to date with all their moves with the team's transaction tracker:
3/14/2015: Signed RB Reggie Bush to a one-year, $2.5 million contract. Signed CB Shareece Wright to a one-year, $3 million contract. Signed G/T Erik Pears to a two-year, $4.7 million contract. Re-signed CB Chris Cook to a one-year, $1.