Rose, 21, batted .232 with one home run and 41 RBI last year for the Class A Frederick Keys. Borowski pitched for the rookie league Sarasota White Sox last year, compiling a 2-8 record with a 5.58 ERA, but struck out 67 in 74 innings.
"We felt with Leo Gomez and [Craig] Worthington, Tim Holland and T.R. Lewis, we had some depth at third base," assistant general manager Doug Melvin said. "Pete hustled. He played hard. We hated to trade him, but it happens sometimes."
Rose would not have gotten regular playing time at third base at any level in the Orioles' minor-league system, so the club probably did him a favor by moving him to a team that figures to take a serious look at him.
* The New York Yankees added insult to injury for Orioles starter Dave Johnson, who earlier in the day had found out that he would not be Baltimore's Opening Day starter.
Johnson gave up seven runs and 13 hits over seven innings to take his second loss of the spring. He also gave up his fourth home run in 24 innings, a two-run shot to Jim Leyritz in the seventh inning to cap a truly forgettable appearance.
The Yankees went right after him, scoring five runs in the first inning. Mel Hall drove in two of them with a bases-loaded single. He also hit a two-run homer off Gregg Olson in the ninth.
* The Orioles tied the club record for runs scored in exhibition play yesterday. They scored twice to raise their spring total to 144 and match the offensive output of the 1985 Grapefruit League Orioles. The club still has six exhibition games left.
* Manager Frank Robinson said this weekend that right-hander Jose Mesa has made the team, but stopped short of saying that Mesa would be in the starting rotation.
"There may not even be a set starting rotation the first couple of weeks," Robinson said. "He does not have to win a job. He will be on the team. When he will pitch and where he will pitch, I don't know yet."
It seems apparent, however, that Mesa will be a starter. He became the first Orioles pitcher to work seven innings on Saturday night.
* Juan Bell apparently has made the club as a utility infielder, and not just because he was out of options. He came into yesterday's game batting .341.
Since he is out of minor-league options, the Orioles would have to send him through waivers. Melvin said he doesn't think he would go unclaimed.
"I don't think he would clear waivers," Melvin said. "He's 22 and he's hitting .330. How do you send a guy down who's hitting .330 anyway?"
* Left fielder Randy Milligan did not play in either game at Joe Robbie Stadium. His sprained ankle still is hurting him, so Robinson gave him a couple of days off to let the inflammation settle down.
"It's something I may have to play with for a while," Milligan said.
* The Chicago White Sox approached the Orioles last week about the availability of first baseman David Segui, but apparently were told that he was not available.
* Melvin said that a number of clubs have expressed an interest in left-handed knuckleballer Dan Boone, who asked to be traded when it became apparent that he would not make the Orioles' major-league roster.
* The Orioles have optioned Class AAA outfielder Victor Hithe to the Leon club in the Mexican League.