Gallen made an adjustment in an effort to improve his command for Friday's start, Nick Piecoro of the Arizona Republic reports.
Gallen adjusted his arm swing following his first start Sunday, when he walked five batters and threw just 46 strikes out of 88 pitches. The right-hander showed markedly improved command Friday in a no-decison; he walked just one batter and threw 72 strikes among his 96 pitches.