CINCINNATI -- The Nationals selected the contract of right-hander Jacob Turner from Triple-A Syracuse on Monday, giving the club another option to start as it looks for a permanent replacement for Joe Ross.
Ross, who made 13 starts this season, learned this week he needs Tommy John surgery.
For at least one start, it will be Edwin Jackson who takes Ross' spot in the rotation, as he'll make his first appearance of the year for the Nationals when they take on the Angels on Tuesday. Jackson -- who went 5-6 with a 5.89 ERA in 13 starts in 2016 -- signed with Washington in June.
Turner, a first-round Draft pick of the Tigers in 2009, has made two starts and 16 relief appearances for the Nationals this season, pitching to a 5.08 ERA in 39 innings. He went 0-1 with an 11.74 ERA in two starts for Syracuse after being outrighted July 3.
Turner could provide relief depth as the club waits for newly acquired relievers Sean Doolittle and Ryan Madson to arrive. Washington acquired Doolittle and Madson from Oakland on Sunday.

"I've talked to [Athletics manager] Bob Melvin, who was one of my guys when I was a head coach with the Giants, and I'm close with Bo Mel and I know he'll tell me the truth," Baker said. "He called and told me that we got two of his best guys, on the field and off the field."
Both Madson and Doolittle have closing experience in their careers, but Baker has yet to commit to one over the other for the role.
To make room for Turner on the roster, the Nationals transferred reliever Koda Glover to the 60-day disabled list. He's been inactive since early June with back stiffness.
"We put Koda on the 60-day because it's been 30 or more days already, so we figured hopefully he'll be ready at the end of the next 30 days," Baker said. "Because, like I said, he hadn't really started throwing yet. So it's going to take him a while to get back once he is healthy."