Rivera was signed back in May from the Long Island Ducks. The infielder has not played in the majors since spending time with the Mets in 2017. In 57 games with Triple-A Indianapolis has hit .249/.295/.384 with five homers in 212 plate appearances. 

The 32-year-old has not played in the major leagues since 2017 with the Mets when he hit .290/.330/.430 in 231 plate appearances.  Rivera recently signed a contract to play for the Long Island Ducks, but the Pirates are an obvious step up regardless of what some may say to the contrary. 

This is actually his second stint with the club, as he previously played with the Ducks in 2019. The 32-year-old played for the Nationals' Double-A affiliate in 2019 and hasn't appeared in the majors since 2017 with the Mets. He'll try to showcase his skills in hopes of latching on with another major league organization.

It's unclear whether Rivera's deal includes an invitation to big-league spring training, but he'll be a longshot to surface in the majors during the upcoming season in any case. Rivera last saw MLB action in 2017 with the Mets and has missed most of the past two seasons due to injury. He was ineffective in a 15-game stint with the Nationals' Double-A affiliate at Harrisburg in 2019, slashing .237/.293/.316 across 41 plate appearances.