If all goes well this week, Wilhelmsen could throw another bullpen or a simulated game early next week in Anaheim before being sent out an a Minor League rehab assignment about the time the Mariners return home at the end of their current 10-game road trip.
Wilhelmsen said his arm felt great on Tuesday and the hard part now is sticking with the rehab program set up by the team's training staff.
"I'm ready to go," Wilhelmsen said. "I'm pretty eager. Once everything is feeling good, you want to get right back into it."
Wilhelmsen made just two appearances this season, allowing two runs and five hits in 2 2/3 innings, before injuring his arm when he got accidentally twisted backward by teammate Danny Farquhar as Farquhar ran by while he was stretching in the bullpen in Oakland on April 11.
Wilhelmsen was a critical part of last year's bullpen success as he posted a 2.27 ERA in 79 1/3 innings over 57 appearances.
• While Nelson Cruz hit .382 with nine homers and 19 RBIs in his first 14 games in right field compared to .100 with no homers and two RBIs in his initial five games at designated hitter, manager Lloyd McClendon said that hasn't played into his decision to use the 34-year-old more in the outfield than many expected so far.
"When I think he needs a day for his legs, I give it to him," McClendon said. "If not, I'm going to play him in the outfield. I reassess it every day. I have to make sure I keep him healthy. I have to be smart about it."
• Broadcasters Aaron Goldsmith and Dave Sims are flipping roles for the Rangers and upcoming Astros series, with Goldsmith moving into the TV booth alongside Mike Blowers and Sims taking radio duties alongside Rick Rizzs. The Mariners will use that alignment at various times this year as a change of pace.
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.