The Colorado Rockies announced Sunday that they have selected the contract of left-handed pitcher Jerry Vasto and placed right-handed pitcher Scott Oberg on the 10-day disabled list with a back strain, retroactive to June 8. Additionally, right-handed pitcher Jairo Díaz has been designated for assignment.
 
•  Vasto, 26, will be making his first career appearance on the Rockies' active roster … in 19 relief appearances with Triple-A Albuquerque has gone 2-0 with three saves, a 1.71 ERA (21.0 IP, 4 ER), eight walks and 26 strikeouts … has not allowed a run in 16 of 19 appearances, including each of his last eight appearances since May 12 (9.0 innings) … in 161 career Minor League appearances, has gone 11-11 with a 3.70 ERA (189.2 IP, 78 ER), 74 walks and 227 strikeouts … was originally selected in the 24th round of the 2014 First-Year Player Draft out of Felician College… will be wearing number 30.
• Oberg, 28, has gone 1-0 with a 4.08 ERA (17.2 IP, 8 ER), six walks and 13 strikeouts in 16 appearances across two stints with the Rockies this season … has not allowed an earned run in six appearances since his most recent recall on May 28 … with Albuquerque this season, is 1-0 with a 1.88 ERA (14.1 IP, 3 ER), two walks and 13 strikeouts across 12 appearances … the Tewksbury, Mass., native was originally selected by Colorado in the 15th round of the 2012 First-Year Player Draft and has gone 5-6 with two saves, a 4.94 ERA (160.1 IP, 88 ER), 72 walks and 132 strikeouts since his Major League debut on April 14, 2015 vs. San Francisco. 
 
• Díaz, 27, has made four relief appearances with Triple-A Albuquerque this season, allowing four earned runs across 3.2 innings pitched (9.82 ERA) … has been on the disabled list since April 19 … made four relief appearances for the Rockies in 2017 after missing the 2016 season with Tommy John surgery, posting a 9.00 ERA (5.0 IP, 5 ER) … originally acquired by the Rockies via trade with the Los Angeles Angels on Dec. 10, 2014, Díaz has a career Major League record of 0-1 with a 3.64 ERA (29.2 IP, 12 ER), 14 walks and 28 strikeouts in 30 appearances across three seasons with Los Angeles-AL (2014) and Colorado (2015, 2017).