HOUSTON — Seattle right-hander Bryan Woo has "minor inflammation" in his pectoral muscle and is listed as day to day, manager Dan Wilson said Saturday.

"The MRI revealed some minor inflammation in his pec and it's really just kind of a day-to-day thing," Wilson said. "We'll continue to assess him each day. We'll know a little bit more in the next 24 to 48 hours depending on how he responds, and that's really what we know at this point."

Woo exited the Mariners' 4-0 win over the Houston Astros on Friday night after throwing a couple of warmup pitches in the sixth inning.

Shortly after Woo started warming up on the mound for the sixth, a team trainer and coaches came out. After a brief discussion, the All-Star exited with the trainer and Eduard Bazardo replaced him.

Wilson was asked if W

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