Billy Beane has been doing this for years with AAAA positionless sluggers. He hit paydirt with Jack Cust but mostly he just clogged his roster with guys that couldn't field and didn't hit much either.
On last year's Oakland team alone, there were plenty of successful examples.
1B Brandon Moss -- Reached AAA in 2007, one bad MLB year in 2009, finally started again as a 29 year old in 2013 with a .859 OPS on the season.
SS Jed Lowrie -- Reached AAA in 2007, but could never catch on with the Red Sox. Had an okay year with the Astros in 2012 before being acquired by the A's for 2013 and putting up a .791 OPS as a 29 year old.
3B Josh Donaldson -- The A's own AAAA story, reached AAA in 2010. Finally broke out in 2013 at age 27 as a starter and All-Star with a .883 OPS.
OF Josh Reddick -- Stuck between AAA and MLB since 2009 before being acquired by Oakland for 2012. Down year in 2013, but 32 homers in 2012.
2014 -- the year of the Handsome Cola!