A late bloomer who didn’t reach the majors until he was 27, Rivera hit .304/.335/.445 over 344 plate appearances for the Mets in 2016-17. He hasn’t been back to the Show, however, since undergoing Tommy John surgery in September 2017, and was limited to only six minor league appearances in the Mets’ farm system in 2018 before being released in Spring Training.
Rivera then took time off to get fully healthy before inking a deal with the independent Atlantic League’s Long Island Ducks in early July, and hit .273/.323/.440 over 93 PA for the Ducks. He’ll now provide the Nationals with some versatility around the infield, as Rivera has a wealth of experience at second, third, and first base (plus some shortstop early in his career, and a handful of games as a corner outfielder). Though his Double-A assignment doesn’t hint that a big league call-up is imminent, Rivera nonetheless provides some extra depth for a Nats club that just lost Howie Kendrick to the injured list earlier today.