When the camera turns to him, Washington is seen inhaling from the cigarette.
Steve DelVecchio, with Larry Brown Sports, noted that the dugout area is off-limits for smoking.
However, he points out that Washington could have been taking a drag on an electronic cigarette.
The Rangers trounced the Mariners 11-2, moving to 12-6 on the season.
In 2010, Detroit Tigers manager Jim Leyland, who famously smoked in the dugout throughout his career, was forced to put the cigarettes away after Michigan lawmakers passed a bill to ban smoking in public areas.
“I’m a law-abiding citizen, so it’s just the way it is,” Leyland said at the time, according to ESPN. “We’re not supposed to smoke here, and I won’t do it. I’ll try to find someplace outside somewhere, I guess, but I think you’re not supposed to smoke at all in the park.”