What happened: Cook brings two seasons of NFL experience at safety. Murray enters his sixth season after converting from defensive line to offensive line.
Why it matters: The additions give Los Angeles more depth in the secondary and along the offensive front. Both players now have training camp to compete for roster spots before final cuts.
By the numbers: Cook has appeared in 10 NFL games with two starts. Murray has played four games without a start.
What to watch: Their practice roles and preseason snaps will show where they fit in the Rams' depth plans.