Vaughn's offensive production has improved in the week since the Sox called up first base prospect Tim Elko — and it's not because Vaughn is feeling the pressure, he says.

Tim Elko collected his first MLB hit — a go-ahead three-run home run — to lead the Chicago White Sox to a 4-2 win over the Miami Marlins on Sunday.

After hitting 10 home runs in 31 games for the Triple-A Charlotte Knights, the White Sox have called up first baseman Tim Elko.