The announcements were made by Executive Vice President/General Manager Ben Cherington.
Quiroz, who will wear No. 62, has spent his entire 2012 season with Seattle’s Triple-A affiliate in Tacoma and was named to the Pacific Coast League’s mid-season All-Star team. The right-handed batter hit .278 (84-for-302) with 15 doubles, a triple, 15 home runs, 52 RBI, 45 runs scored and 36 walks in 89 games for the Rainiers, including a team-leading 88 contests as catcher. Quiroz, 30, tallied a .315 average (23-for-73) and .521 slugging percentage against left-handed pitching and hit .319 (15-for-47) with runners in scoring position and two outs. Behind the plate, he threw out 15 of 66 (22.7%) attempted base stealers. Originally signed by Toronto in 1998, Quiroz has appeared in 101 Major League games with the Blue Jays (2004-05), Mariners (2006, 2009-10), Rangers (2007) and Orioles (2008), going 53-for-255 (.208) with 11 doubles, two homers, 28 RBI, 19 runs and 17 walks.
The 27-year-old Mortensen, who was most recently optioned to Portland after the game on August 28, will be in his sixth stint with the Red Sox this year. He is 1-1 with a 2.25 ERA (8 ER/32.0 IP) and 26 strikeouts, and has held opponents to a .211 clip (24-for-114) in his 19 appearances with Boston this season, all in relief. The right-hander also posted a 5-3 mark with two saves, a 2.33 ERA (10 ER/38.2 IP) and 36 strikeouts in 25 minor league games out of the bullpen, including 24 with Triple-A Pawtucket and one with Portland. Acquired by Boston from Colorado in January, Mortensen has appeared in 43 Major League games (13 starts) between the Cardinals (2009), Athletics (2009-10), Rockies (2011) and Red Sox (2012), going 5-9 with a 4.39 ERA (62 ER/127.0 IP) and 76 strikeouts, including a 2.91 ERA (19 ER/58.2 IP) in 30 Big League relief appearances.