Athletics' Cespedes '50-50' to start Tuesday after 'feeling something' in left hamstring

Yoenis Cespedes was on track to rejoin the Athletics lineup on Tuesday but an untimely setback may derail those plans. 

Cespedes tested his hamstring prior to Monday's game in Texas - the fourth straight game he's missed - and after experiencing some irritation it wouldn't be a surprise if the A's take the cautious approach and keep him out of the lineup.