Alvarez will undergo an MRI on his right knee Monday after an X-ray on Sunday came back negative, Matt Kawahara of the Houston Chronicle reports.
Alvarez exited Sunday's game against the Angels after banging his knee on the ground on a slide and is not in the lineup for Monday's series opener versus the Mariners. Astros manager Joe Espada noted that the slugger woke up sore Monday, although Alvarez had been set to undergo an MRI regardless. Consider Alvarez day-to-day for now, with more clarity on his situation potentially coming later in the day.