Arenado (ribs) will remain sidelined Monday, Jenny Cavnar of Root Sports reports. He exited Sunday's game after just three innings after suffering a bruise on the right side of his chest. He was supposed to undergo X-rays Monday, but the results of those have not been made public. Still, it seems likely that he's just day-to-day at this point. Rafael Ynoa will get the start at third base Monday.