Ryan Chiaverini

Viewers of WLS-Channel 7 news may do a double-take when they see who’s anchoring sports this weekend.

With Dionne Miller ailing and both Mark Giangreco and Jim Rose out of town, the ABC-owned station has drafted Ryan Chiaverini, host of “Windy City Live,” to fill in as sports anchor on its Saturday and Sunday newscasts. It’s a return to the role Chiaverini held before he began hosting the live daily talk show with Val Warner in 2011.

“I’m going back to my roots,” he joked as he prepared to deliver his first sportscast in four years. “Wish me luck.”

Chiaverini, 37, who played football at the University of Colorado, joined ABC 7 as a sports reporter in 2006 and was promoted to weekend sports anchor in 2009. Two years later he landed the “Windy City Live” job following months of auditions involving hundreds of candidates.