Burton (back) was activated off the DL and assigned to High-A Tampa on Tuesday, The Westchester Journal News reports. Burton, who had been dealing with a strained lat since spring training, will likely work his way up to Triple-A Scranton/Wilkes-Barre after a few appearances at High-A. The 34-year-old has plenty of major league experience, so he could be in line for a call up to the big league team at some point this season to serve as an extra arm in the bullpen.