Cron, who figures to bat eighth, walked twice and lined out against Vargas on May 25 and hit two homers against him on June 27. The Royals' 31-year-old left-hander, who spent the 2013 season with the Angels, held opposing left-handed hitters to a .661 OPS this season, while righties had a .731 OPS against him.
The Angels' other options at DH were lefties Brennan Boesch and Efren Navarro, though only one of them figures to crack the postseason roster.
Cron, 24, sported a .256/.289/.450 slash line with 11 homers and 37 RBIs in 79 games with the Angels this season. The Angels have had a revolving door at DH ever since releasing current Royals veteran Raul Ibanez on June 21, with Cron, Navarro and Boesch all seeing time there.
Alden Gonzalez is a reporter for MLB.com. Read his blog, Gonzo and "The Show", and follow him on Twitter @Alden_Gonzalez. This story was not subject to the approval of Major League Baseball or its clubs.