The Diamondbacks have designated right-hander Zach Davies for assignment, the team announced. Fellow righty Justin Martinez has been recalled from Triple-A to take his place on the active roster.

Davies was a solid back-of-the-rotation starter for Arizona last year, making 27 starts with a 4.09 ERA. That hasn’t been the case this season, as he is pitching to a 7.00 ERA in 18 starts, interspersed between two separate stints on the injured list. Despite his poor performance, the D-backs have kept him around, since they have struggled to find reliable starters to pitch behind Zac Gallen and Merrill Kelly all year. Now, however, with just five games remaining in the regular season and the playoffs right around the corner, Arizona no longer has much need for an innings eater on the roster.

This could be an indication the Diamondbacks are planning to make an addition to the 40-man roster ahead of the playoffs, or it could simply be a way of making room to add an extra relief arm for the final five games of the regular season.

Davies, who is making $4.7MM this season and has a $300K buyout for next year, is likely to go unclaimed on waivers, at which point the D-backs would be responsible for the guaranteed salary remaining on his contract. Still just 30 years old, he shouldn’t have trouble finding a new club in the offseason, although he might have to settle for a minor league deal.

Martinez, a right-handed reliever, is the team’s No. 24 prospect, per MLB Pipeline. He made his MLB debut earlier this season and has pitched to a ghastly 14.63 ERA in a few brief call-ups to the big league squad. His numbers at Triple-A are much more palatable; he has a 4.20 ERA in 47 games, although his 21.2% walk rate is still alarming. It’s unlikely he’ll play much of a role while the D-backs are fighting for a postseason berth, but he’ll provide manager Torey Lovullo with an extra arm out of the ’pen.