By PAT GRAHAM AP Sports WriterDENVER (AP) — Colorado general manager Josh Byrnes helped orchestrate a trade with his former team Monday as the Rockies sent right-hander Seth Halvorsen to the Los Angeles Dodgers for two minor league players. As part of the deal, Colorado picked up right-handed pitcher Nick Frasso and outfielder Landyn Vidourek from the Dodgers. Byrnes knows the Los Angeles farm system after spending more than a decade in the front office with the team. The Rockies entered the day 23 1/2 games behind Los Angeles in the NL West. Byrnes and DePodesta figure to be fielding quite a few calls with the trade deadline in two weeks.