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

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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.