Gregg, 34, has spent all or part of the last 10 seasons in the big leagues, including the 2009 season with the Cubs. Gregg carried a 3.35 ERA (18 ER/48.1 IP) and converted 21 of 24 saves chances (88 percent success rate) into the month of August before being slowed by left knee soreness the final two months of the season. Overall, Gregg went 5-6 with 23 saves and a 4.72 ERA (36 ER/68.2 IP) in 72 appearances. He struck out 71 batters in 68.2 innings and limited opposing batters to a .229 batting average and a .312 on-base percentage.
The 6-foot-6, 230-pound Gregg followed his season with the Cubs by collecting a career-high 37 saves and posting a 3.51 ERA (23 ER/59.0 IP) in 63 appearances with the Blue Jays in 2010. After spending the last two seasons with the Orioles, Gregg went to spring training this year with the Los Angeles Dodgers and posted a 0.82 ERA (1 ER/11.0 IP) in 11 appearances, limiting opposing hitters to a .088 batting average and tallying a 0.27 WHIP.
Overall, Gregg is 28-38 with 144 saves and a 4.13 ERA (293 ER/638.2 IP) in 509 major league appearances (eight starts) with the Angels (2003-06), Marlins (2007-08), Cubs (2009), Blue Jays (2010) and Orioles (2011-12). He signed a minor league contract with the Cubs on Sunday after being released by the Dodgers on April 3.
Loe, 31, was claimed off waivers by the Cubs from the Seattle Mariners on Sunday. He has pitched all or part of nine major league seasons with Texas (2004-08), Milwaukee (2010-12) and Seattle (2013).
Since moving into a full-time relief role with the Rangers in 2008, Loe has gone 15-18 with three saves and a 3.81 ERA (100 ER/236.0 IP) in 213 appearances. Overall, Loe is 33-41 with four saves and a 4.44 ERA (271 ER/549.0 IP) in 306 career big league appearances, all but 47 in relief.
Barney, 27, batted .500 (5-for-10) with one double and four runs scored during a three-game rehab stint with Iowa that ended yesterday. He was placed on the 15-day disabled list on April 1 with a left knee laceration.
Takahashi, 38, posted no record and a 6.00 ERA (2 ER/3.0 IP) in three relief appearances with the Cubs this season.
Dolis, 25, recorded a scoreless relief outing in his lone Cubs appearance this season.
Chicago's 40-man roster stands at 40 players.