Matusz has lost three straight decisions and four of his last five. After turning in arguably his best outing of the year on June 2 -- allowing one run on two hits in 7 1/3 innings against the Rays -- Matusz has posted an 8.03 ERA in his previous three starts. He's struggled with his command over that span, walking 10 and fanning nine.
Matusz allowed four runs on nine hits over five innings for a loss against the Angels on April 20. He is 1-3 with a 6.10 ERA in four career starts against them.
Wilson, on the other hand, hasn't lost a start since May 17, and he has picked up the win in four of his last six outings. He's 2-0 with a 1.65 ERA in four starts in June, going at least six innings in each and allowing one or no runs in three of the starts.
Wilson will be throwing on six days' rest. But the 31-year-old left-hander doesn't put much stock into how much rest he's had going into a start.
"Baseball players are creatures of habit, and the routine for us is every five days. There's upsides and downsides," Wilson said. "The downside is it gives you more idle time, which isn't necessarily good. But the upside is, over the course of the season, here and there, little breaks kind of spell you. But everybody here's competitive, we want to get as many starts as we can."
While it may not feel much different for Wilson, statistically he has proven to be a little more effective with extra rest in his career. He has a 2.91 ERA in 10 starts with six days of rest and a 4.18 ERA in 76 starts with five days of rest.
Angels: Williams to throw simulated game
Starter Jerome Williams will throw a three-inning simulated game in the bullpen during the Angels' upcoming three game-series in Baltimore. Williams was hospitalized after passing out due to shortness of breath after his start against San Francisco on Monday.
Williams, who is 6-5 with a 4.46 ERA this season, was placed on the DL and is not eligible to return until July 4. Garrett Richards has taken Williams' spot in the rotation for now.
Torii Hunter is batting .345 with 12 RBIs and 11 runs scored while hitting in the two-hole this season. He has 16 RBIs and 18 runs scored in 38 starts in any other spot in the lineup this year.
Orioles: Bullpen on a roll
After throwing three scoreless innings Sunday, the Orioles' bullpen owns a Major League-best 2.27 ERA. They have four relievers with ERA's under two, and closer Jim Johnson has converted 22 of 23 save chances.
"We don't have big names, but we have big numbers," said veteran Luis Ayala, who owns a 1.89 ERA.
Baltimore's bullpen also leads the American League with 15 wins.
Mark Reynolds is batting .253 with three homers at Oriole Park this season, while hitting .204 on the road.
Current Angels hitters are batting .448 off Matusz. Howie Kendrick has the best history against Matusz, going 6-for-12 with a pair of doubles off the left-hander.
The Angels took two out of three at home against the Orioles from April 20-22 earlier this season.