There’s little point in belaboring an awful day of baseball for the Orioles in a 9-6 loss to the Tampa Bay Rays on Sunday to conclude a 5-4 homestand. Fielding miscues, baserunning mistakes, and missed opportunities at the plate were disheartening enough but pale in comparison to the growing concern over starting pitcher Brian Matusz. The hideous final line included 1 1/3 innings pitched, four earned runs, five hits, four walks, no strikeouts, and a home run allowed in the shortest outing of his career not including a one-inning stint cut short after being hit by a line drive against Toronto last Sept. 13. However, the numbers only begin to explain why manager Buck Showalter and the Orioles are concerned with Matusz, who was making his third start of the season after missing the first two months of the season with an intercostal strain. As was the case in his first two starts, Matusz only threw his fastball in the 86-88 miles per hour range. Unlike the first two starts, however, the lefty was all over the place with his command, looking uncomfortable from the start. “From the get-go, I didn’t get a good feel warming up in the bullpen,”