Brandon Beachy will make his first minor league rehab appearance tonight with Single-A Rancho Cucamonga, a 7 p.m. home game against the High Desert Mavericks. (Getty Images)

Brandon Beachy will begin his long-awaited minor league rehabilitation assignment tonight with Single-A Rancho Cucamonga. Beachy, whom the Dodgers signed to a one-year deal with an option for 2016 in February, hasn’t pitched in a competitive major-league game since 2013. His career was derailed by two Tommy John surgeries, but at age 28 is nearing a return to the majors.

Beachy’s rehab assignment can last 30 days from start to finish, unless he has a setback that requires him to take some time off. Thirty days from now projects to a return just after the All-Star break. The Dodgers begin the second half with a road trip to Washington, Atlanta and New York starting July 17.

Who knows what the Dodgers’ rotation will look like by then. Beachy has a 3.23 ERA in 46 career starts, all with the Atlanta Braves from 2010-13.

Dodgers pitcher Brandon League (shoulder) is expected to make a relief appearance in the game for Rancho Cucamonga as well.

Update (1:40 p.m.): Beachy will start and pitch two innings.