Right-hander Miles Mikolas, who spent last season in the San Diego organization, was acquired Monday by the Rangers in a trade with Pittsburgh for first baseman Chris McGuiness.Mikolas, 25, went 4-2 with a 3.25 ERA and 26 saves at Triple A Tucson and worked 12/3 scoreless innings over four brief stints with the Padres. But he was designated for assignment in November and claimed by the Pirates.McGuiness made his major-league debut in June while Mitch Moreland was out with a groin injury, but he was designated last week to open a roster spot for Shin-Soo Choo.To make room for Mikolas on the 40-man roster, the Rangers designated outfielder Rafael Ortega for assignment. — Jeff WilsonDodgers talk to PuigThe Dodgers have told outfielder Yasiel Puig the organization is “very disappointed” with his behavior in the wake of his second arrest this year for reckless driving. The team said Puig’s behavior “is a very serious issue to us.” The Dodgers said they would continue to educate the 23-year-old Cuban defector and strive to further develop his growth off the field. Puig was arrested Saturday in Naples, Fla., after the Florida Highway Patrol clocked him going 110 mph in a 70-mph zone. Authorities said Puig was arrested and charged with reckless driving and taken to the Collier County Jail for processing.