Moss, who came to the Giants in the offseason deal that sent right-hander Russ Ortiz to Atlanta, said he was stunned to learn of the trade to Baltimore.
“I was surprised, very surprised,” said the 26-year-old left-hander, who went 9-7 with a 4.70 ERA while with San Francisco. ”(Giants pitching coach Dave Righetti) came up to me in the clubhouse and said, ‘You’ve been traded.’ I was in shock for a bit.
“When you consider (the Giants) traded away their ace for me, you feel pretty secure. But that’s just part of the business.”
Moss started the season 5-0, but lost six of eight decisions before going 2-1 with a 2.84 ERA in his last three outings.
He is taking Ponson’s spot in the rotation for now, but the Orioles are hoping he will become their No. 2 or 3 starter next season.
Moss threw an abbreviated bullpen session Saturday for manager Mike Hargrove and pitching coach Mark Wiley. Hargrove, who did not know much about his new starter, was impressed.
“He has a nice easy delivery,” Hargrove said. “He has a good fastball and curveball. He was fine.”
The Orioles are coming in off Sunday’s 7-5 loss to the Boston Red Sox, which snapped an eight-game home winning streak.
The Twins have won four of their last five, including a 7-2 victory over the league-worst Detroit Tigers on Sunday.
Shannon Stewart went 2-for-4 with a home run for Minnesota.
STANDINGS: Twins - 3rd place, 4 1/2 GB, AL Central. Orioles - 4th place, 14 1/2 GB, AL East.
TWINS PROBABLE STARTER: Brad Radke (7-9, 5.12 ERA). A winner of just two of his last 13 starts, Radke gave up a season low-tying one earned run and six hits over 7 1-3 innings in Wednesday’s 5-1 win over Baltimore and Ponson. He has had an up-and-down season, but is 2-0 with a 3.00 ERA in his last three starts. Radke is 7-4 with a 4.10 ERA in 14 career appearances, including 13 starts, against the Orioles.
ORIOLES PROBABLE STARTER: Moss (0-0, 0.00 ERA). Moss gave up three earned runs and five hits over seven innings in Tuesday’s 3-0 loss to the Chicago Cubs. He has faced the Twins twice in interleague play, going 1-1 with a 3.86 ERA.
OFFENSIVE LEADERS: Twins - Jacque Jones, .309 avg.; Torii Hunter, 18 HRs and 67 RBIs; Stewart, 60 runs; Cristian Guzman, 13 SBs. Orioles - Melvin Mora, .325 avg.; Tony Batista, 19 HRs; Jeff Conine, 76 RBIs and 67 runs; Roberts, 17 SBs.
SEASON SERIES: Twins, 2-1.
STREAKS AND NOTES: Twins - Since coming over in a trade with Toronto on July 16, OF Stewart is hitting .428 with three homers, nine RBIs and 15 runs scored. He has reached base in 16 of the 17 games he’s played with Minnesota. … After Sunday’s game, Minnesota activated 3B Corey Koskie from the 15-day disabled list and optioned INF Alex Prieto to Triple-A Rochester. … RHP Radke is 2-4 with a 3.38 ERA in nine starts on the road this season. Orioles - RHP Ainsworth, who is on the 15-day disabled list with a fractured shoulder blade, underwent a physical Sunday and will be put on a rehabilitation program designed by Orioles trainer Richie Bancells. If all goes well, he will make his debut with Baltimore after rosters expand to 40 players. … LF Mora missed his sixth straight start Sunday because of a hand injury. … CF Matos has homered in two straight games and hit safely in 31 of his last 38.
ROAD/HOME RECORDS: Twins - 23-28 on the road; Orioles - 29-25 at home.
INJURIES: Twins - OF Lew Ford (arm), 15-day DL; RHP Mike Fetters (hamstring), 60-day DL; LHP Eric Milton (knee), 60-day DL. Orioles - 1B David Segui (wrist), 15-day DL; OF B.J. Surhoff (quadriceps), 15-day DL; RHP Ainsworth (shoulder), 15-day DL; LHP Omar Daal (shoulder), 15-day DL; LHP Erik Bedard (elbow), 60-day DL; RHP Scott Erickson (shoulder), 60-day DL; RHP Willis Roberts (knee), 60-day DL; 2B Jerry Hairston Jr. (foot), 60-day DL; OF Albert Belle (hip), 60-day DL; OF Marty Cordova (elbow), 60-day DL; LF Mora (hand), day-to-day.