Donovan Ricketts broke his left ulna – one of the two long bones in the forearm – after colliding with the Earthquakes’ Khari Stephenson in the 21st minute of Saturday’s game in San Jose.

An x-ray taken today confirmed the suspected fracture. The Jamaican international, who had just returned from Gold Cup duty, will have surgery Tuesday in Santa Monica and miss a minimum of four weeks.

Ricketts, 33, is leading MLS in goals against average, allowing just six goals in 12 games. He also has six shutouts.

Not good news for the Galaxy with the busiest weeks of the season still ahead.

Incidentally, midfielder Mike Magee was named MLS Player of the Week today for the 47 minutes he played in goal during the game after Ricketts’ replacement, Josh Saunders, was red-carded. Magee made four saves.

The Galaxy play a third round U.S. Open Cup game against the USL Pro LA Blues at 7:30 p.m. Tuesday at Titan Stadium in Fullerton.