Should I trade A-rod straight up for Beltran???

With the playoffs weeks away we all know that Beltron some how transforms himself into Mickey Mantle, Willie Mays & Joe Dimaggio all rolled into one & A-Rod goes into a huge slump. In my fantasy league one guy is offering me Beltran straight up. Will history repeat itself should I dump A-Rod as Beltran will go on fire in the playoffs like he always does?