Elias was sent down to Tacoma on Aug. 7 in order to lessen his workload and give the club some roster flexibility over the past 10 days. The 26-year-old Cuban made one start for Tacoma on Aug. 13, throwing five no-hit innings with one walk in New Orleans while striking out six.
Jones played in just four games in his third stint with the Mariners this season before being optioned back to Tacoma. He went 0-for-2 with an RBI and run scored while serving as a pinch runner and defensive replacement.
For the season, the 25-year-old rookie was hitting .256 with 39 runs and a club-leading 20 stolen bases, but he lost his starting center-field spot when the Mariners acquired Austin Jackson from the Tigers on July 31.
The decision to send Jones back down leaves the Mariners with just 12 position players as they've stayed with their eight-man bullpen, carrying an extra arm to continue bolstering a group that has the lowest ERA in the American League at 2.39.
"It's the identity of this ballclub," manager Lloyd McClendon said. "It's our foundation. If you start trying to put chinks in that foundation, that's not good. The sum is greater than the parts. I just don't see tinkering with it."
Greg Johns is a reporter for MLB.com. Follow him on Twitter @GregJohnsMLB as well as his Mariners Musings blog. This story was not subject to the approval of Major League Baseball or its clubs.