Rodney owns a 6.75 ERA in 26 appearances and blew saves in two of his last three opportunities before McClendon made the switch to Smith, who has a 1.38 ERA in 27 games coming into Friday's series opener against the Astros.
Rodney has been working on refining some things with pitching coach Rick Waits while throwing in lower-impact situations. He allowed two hits and a run in Wednesday's win, then threw a hitless inning with one walk on Thursday.
"I don't think he's quite ready to go back to the closer's role," McClendon said. "We'll use him where we think it fits the best. He's getting better. He's still working on things every day. It's coming. It's not quite there yet."
• Hisashi Iwakuma emerged from Thursday's bullpen session in Tacoma without any problems and will now throw a simulated game of about 45 pitches on Monday in Everett against Class A hitters, since both the Mariners and Rainiers will be on the road early next week.
Iwakuma, sidelined since April 23 with a strained right lat muscle, could be ready for a Minor League rehab start next Saturday for Tacoma if all goes well, McClendon said. The Rainiers play in Albuquerque that day.
• McClendon had Nelson Cruz back at designated hitter on Friday after sitting out two games with back spasms. But the skipper said he won't hesitate to continue playing Cruz in right field and doesn't feel that played any part in his back problem.
Cruz had started 37 games in right field and 21 at DH before being sidelined the last two games of the Indians series after feeling his back tighten during an at-bat on Tuesday.
"I don't think it had anything to do with his play in right field," McClendon said. "The concern about him playing right field is his hamstring. The back is just something that came up. It was a spasm. He took a funny swing and it caught him. I don't have any concerns in that area."
• McClendon said the Mariners are still waiting on results from the latest tests on left-hander James Paxton's strained tendon in his left middle finger before clearing him to begin throwing. Paxton has been sidelined the past two weeks.
• Looking for a premier pitching matchup? When the Mariners return home for their next homestand on Wednesday, it'll be Felix Hernandez vs. Giants star Madison Bumgarner in the 7:10 p.m. Interleague series opener at Safeco Field.
Greg Johns is a reporter for MLB.com. Follow him on Twitter @GregJohnsMLB, read his Mariners Musings blog, and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.