File this under the heading of "left-handed and breathing." The Texas Rangers on Monday added faded left-hander Nate Robertson on Monday, signing him to a minor-league deal that includes an invitation to the major-league spring training. Robertson, 35, last pitched in the majors on Sept. 8, 2010, when he allowed six runs in 2/3 of an inning while with Philadelphia. Robertson is one of only 12 pitchers since 1960 who have an ERA of 5.00 with more than 1,000 career major-league innings. He has a 5.01 ERA in 1,152 1/3 innings. Robertson was a starter with Detroit from 2004-08, going 48-63 with a 4.79 ERA. The Rangers will give Robertson a chance at a bullpen role. Robertson pitched in the independent American Association last season with the Wichita Wingnuts. He is a part-owner of the club. Robertson also pitched at the Triple-A levels with the Chicago Cubs and Toronto organizations last season. He made 23 appearances overall in the Pacific Coast League and had an 8.07 ERA with 43 hits, including eight homers, allowed in 29 innings.