Guzman (forearm) is scheduled to undergo an MRI on Monday, Maria I. Guardado of MLB.com reports.
Guzman has impressed this spring as the Giants try him out as a two-way player, but he exited Sunday's Cactus League appearance with forearm discomfort. Even if the injury winds up being relatively minor, it likely eliminates what already slim chances Guzman had to make the roster.