Belt is out of the lineup for Friday's game against San Deigo, Maria I. Guardado of MLB.com reports.
Belt took the collar on Opening Day, going 0-for-4 with two strikeouts. and will likely have to wait until Saturday to pick up his first hit of the 2019 campaign, barring a pinch-hit appearance. Buster Posey will slot in at first base, allowing for Erik Kratz to start behind the plate.