SAN FRANCISCO -- Giants first baseman and home run leader Brandon Belt has a broken left thumb and his availability for the final week of the regular season and playoffs is unclear.
The Giants said an X-ray Monday showed the broken bone and that Belt will "continue to meet with doctors over the next couple of days to develop a recovery plan and timetable for his return."
The injury is a big blow for the NL West leaders, who begin a home series with the Diamondbacks on Tuesday night still seeking to close out their first division title since 2012.