The Los Angeles Angels announced Thursday that they're shutting down rookie starter Griffin Canning for the rest of the season after an MRI showed mild inflammation in his right elbow joint.

The team said Wednesday night that he was going back on the injured list just three weeks after the same issue landed the 2017 second-round pick out of UCLA on the shelf.

Thursday's announcement comes just four days after Canning had perhaps the best start of his career, going seven innings and allowing just one run in leading the Angels to a 9-2 victory over the Chicago White Sox.

Canning went 5-6 with a 4.58 ERA in 17 starts and one relief appearance. He has 96 strikeouts through his first 18 major league games, second in Angels history behind Jered Weaver, who had 100.