Diamondbacks call up Humberto Castellanos for Saturday start

The Arizona Diamondbacks called up right-hander Humberto Castellanos from Triple-A Reno to start Saturday night's game against the visiting Seattle Mariners.

In a corresponding move, the Diamondbacks optioned right-hander Matt Peacock to Reno.

Castellanos, 23, is 1-1 with a 2.14 ERA in 21 innings through nine games (two starts) this season. He appeared in nine games last season with the Houston Astros, allowing eight ru