The Royals had won six in a row until losing to the Tigers on Tuesday. 
The price certainly is reasonable to back the Royals in a pitching matchup of Brady Singer versus Tarik Skubal. Singer is coming off his best start shutting out the Indians on one hit in eight innings with eight strikeouts this past Thursday. Singer threw a season-high 119 pitches in that game, but is pitching on five full day's rest.
Singer draws a Tigers lineup minus injured second baseman Jonathan Schoop, who was leading the team in homers.  
Skubal has been terrible this season with a 7.27 ERA.