The Rays optioned Robertson to their alternate training site Thursday, Marc Topkin of the Tampa Bay Times reports.

EDGE Analysis

Tampa Bay opted to keep Mike Brosseau as a seventh infielder on the 30-man Opening Day roster over Robertson. Given his ample big-league experience (237 career games) and ability to play all over the diamond and in the outfield, Robertson should rank high on the list for a callup if the Rays need an extra reserve bat at any point in the 60-game season.