Cowgill beat the throw from catcher Tomas Telis and slid in safely with a head-first slide. But second baseman Guilder Rodriguez kept his tag on Cowgill as he slid over the base.
There have been times this year when basestealers have been called out in those situations because after they slide head first, they become disengaged with the base for just a moment. Rangers manager Tim Bogar challenged the ruling by second-base umpire Doug Eddings on that basis, but the call was ruled as stands after review.
Cowgill ended up scoring on a triple by Mike Trout to give the Angels a 3-1 lead in the series opener.
T.R. Sullivan is a reporter for MLB.com. Read his blog, Postcards from Elysian Fields, and follow him on Twitter @Sullivan_Ranger. This story was not subject to the approval of Major League Baseball or its clubs.