De La Rosa (elbow) signed a minor-league contract with the Diamondbacks on Wednesday.
De La Rosa was recently released by Arizona on Sept. 1 in order to free up a 40-man roster spot, but will rejoin the organization heading into the 2018 campaign. The right-hander is unlikely to see any time on the mound this upcoming season after undergoing Tommy John surgery -- for the second time -- in late August.