Michael Saunders has played center and hit first the past four games and has gone 8-for-18 (.444) with two doubles, three runs and four RBIs to raise his average to .263.
Almonte had a big season in Tacoma last year and then batted .264 with two homers and nine RBIs in 25 games for the Mariners as a September callup, but he's struggled to produce in a bigger role this year.
"I just have to keep working and get my feeling back at the plate and I think everything will be OK," Almonte said after learning of his demotion from McClendon. "He told me to go get it going and you'll be back soon."
Almonte entered Sunday's game as a pinch-runner and stole a base in the ninth, giving him three steals in four chances this year.
The Mariners now have five outfielders, including Dustin Ackley, Cole Gillespie, Stefen Romero and Saunders, while designated hitter Corey Hart can also play some right field. Logan Morrison is another outfield candidate, but he's on the 15-day disabled list with a strained hamstring and will need a Minor League rehab stint before he's ready to return.
Jones, 25, will be in his second stint with the Mariners this season. He made his Major League debut and went 1-for-1 April 18 at Miami. In 21 games with the Rainiers, he was batting .321 with three doubles, a triple, two home runs, eight RBIs and five stolen bases.
The team can also add a 26th player on Wednesday for a doubleheader, with starter Erasmo Ramirez being the likely addition to pitch one of the games.
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.