GOODYEAR, Ariz. -- Bronson Arroyo now knows what he's dealing with -- medically.

Arroyo, who has been bothered by what seemed like flu-like symptoms and a dry cough for over two weeks, got the results from a chest X-ray and blood work that were performed on Thursday. Although valley fever was ruled out, the diagnosis was mononucleosis. The Reds pitcher, via text message, said he still did not expect to miss any starts as a result.

Mono is a viral illness that often leaves those who have it easily fatigued or weak. It can linger for several weeks, even when treated properly.

In a Minor League game on Thursday, Arroyo threw 87 pitches over 5 2/3 innings. He missed one start this spring and pitched in another game when he was less than 100 percent. He has a 5.14 ERA over four big league spring games.

Originally expected to be Cincinnati's No. 2 starter, last season's 17-game winner has missed time, and other rotation injuries have put his starting spot into a flux.

Arroyo has one more spring start, on Tuesday against the Indians, which is also the day the Reds break camp and head home to Cincinnati.

"I'm going to treat this last start on the 29th like it's the first game of the season for me," Arroyo said Friday morning before his test results came back. "I will pitch 100 percent, and hopefully be feeling good for April."

Rolen is day to day due to sore elbow

GOODYEAR, Ariz. -- Reds third baseman Scott Rolen was scratched from Friday's original lineup because his left elbow was still sore from being hit by a pitch on Thursday.

"He can't extend," Reds manager Dusty Baker said.

Rolen is considered day to day.

"[Rolen won't play] today and probably not tomorrow," Baker said. "It hit him pretty good."

Chris Valaika started in Rolen's place at third base, while fellow prospect Juan Francisco played right field in a Minor League game. If Rolen needs to be out for an extended period, it could affect the battle for the final bench spots.

Valaika and Francisco are vying against outfielders Fred Lewis, Jeremy Hermida and Dave Sappelt to be the 25th man.

Reds expect to make cuts Saturday and Monday

GOODYEAR, Ariz. -- The Reds' front office and coaching staff were expected to meet after Friday's game to go over the remaining roster moves. Reds manager Dusty Baker expected there to be cuts on Saturday and Monday.

The spring roster is currently at 35 players, and it needs to be finalized with 25 players by Opening Day on March 31.

In past seasons, the Reds have taken extra players to Cincinnati and revealed the final decisions before their home workout, which is on Wednesday. But with an earlier opener this season, that likely won't happen. Triple-A Louisville doesn't open its season until April 7.

"It's different. Usually we're a couple of days apart," Baker said. "Who we break with is who we've got, unless it's a DL guy."

There will be some tough decisions coming. Dave Sappelt, who is batting .564 this spring after a pinch-hit double on Friday, is a non-roster player. So is outfielder Jeremy Hermida and bullpen candidate Dontrelle Willis.

"The major problem we have here is the number of non-roster guys here with not much roster space," Baker said.

Worth noting

Catcher Ramon Hernandez was also scratched from Friday's lineup because his sore right elbow wasn't ready to play.