Espinosa, 30, heads to his third team of the season after stints with both the Angels and Mariners. While he has hit just .164/.237/.279 with six homers on the year, the ex-National is a solid defender who will give Tampa Bay another middle-infield option for the remainder of the year.
Espinosa joins Brad Miller and Adeiny Hechavarria as options up the middle for the Rays, with Daniel Robertson being optioned to Triple-A until rosters expand. Tampa Bay lost some depth by trading Tim Beckham to the Orioles at the trade deadline and has not received any contributions from Matt Duffy so far this year.
Espinosa has seen time in eight major-league seasons, hitting a career .221/.297/.379 with 98 homers. He was a third-round pick of the Nationals in 2008.