There’s no denying the value Trevor Rosenthal provided while wearing the birds on the bat. A 2015 All-Star, Rosenthal was a boon to the Cardinal bullpen from his rookie season in 2012 where he delivered lights-out performances in the postseason.
He kept doing that, as noted by the 2013 World Series highlight featured by Heather yesterday. His most recent season--and last as a Cardinal--was pretty solid, as noted by Jeff Sullivan of FanGraphs.
Now, Rosenthal is a National. After signing a one-year contract with a vesting option with Washington, his 2019 destination is set.