Rosenthal with more information:
Source: Damon deal with #Indians will include out clause that will allow him to depart on specified date after Grady Sizemore returns. Sizemore underwent back surgery on March 1 and is expected to miss 8 to 12 weeks. Damon deal with #Indians also will include full no-trade.
MLBTR throws in their two cents:
Damon, 38, figures to step into Cleveland's left field situation as soon as he's ready to join the team. Shelley Duncan has started all five of the Indians' games in left, but he's best deployed as the right-handed half of a platoon. A fit between the Tribe and Damon seemed natural for most of the offseason. Just 277 hits away from 3,000 for his career, Damon hit .261/.326/.418 with 16 homers and 19 steals for the Rays last season. He has played fewer than 400 total innings in the outfield over the last two years, but he has appeared in at least 140 games in each of the past 16 years. The Indians tried to acquire Bobby Abreu a few weeks ago, presumably for the same role Damon will fill.
Edit: Sorry, some of you beat me to it on the 1st part.