The Forest Park campus seemed a little deserted on April 7, leading some to assume students were watching the St. Louis Cardinals’ home opener. Others blamed a “sick-in” by MetroBus drivers, which left many riders waiting at bus stops and MetroLink stations. “I ended up walking home,” said James Cherry, 28, a general transfer student. Cherry knew something was wrong after waiting more than an hour at the MetroLink station at University of Missouri-St. Louis. He called Metro Transit using the emergency call box on the platform. “We’re short on drivers,” the attendant reportedly said. More than 70 bus drivers called in sick that day, 10 times the usual number, according to local TV and radio stations. […]