BALTIMORE -- Saturday evening, Boof Bonser threw a wild pitch to
Orioles right fielder Nick Markakis. The pitch, which allowed
Brian Roberts to move into scoring position, did a lot more to
Bonser than just allow Roberts to move up 90 feet and eventually
score.  Bonser strained his lower back on the pitch, spent a few
seconds stretching it out on the mound and came back to strike
out Melvin Mora on four pitches to escape the inning. But he
spent the rest of the night in pain from what was termed a lower
back strain.  "They said it was a strain," said manager Ron
Gardenhire. "The doctor looked at him and said it wasn't
structural, as far as the back goes, it's muscular. ... I can't
tell you how long a strain is for a pitcher. He's just going to
be day-to-day.  "I saw him stretching out on the mound, but most
pitchers do that. ... I couldn't tell, and then he came off the
field and said he strained something. He was still throwing the
ball good, velocity didn't go down or anything like that -- he
didn't not thr