Lotney "Sloth" Fratelli (John Matuszak)’s Timeline and Summary

Chained to the walls of a basement, Sloth is fed and "cared for" by his brothers. After Jake leaves the room, Mikey pokes his head in, but the two get only the briefest glimpse of one another.
A while later, Chunk's tied to a chair and left in the basement with Sloth. Chunk quickly discovers that the way to Sloth's heart is through his stomach—which he can relate to—and makes a friend for life when he offers Sloth a Baby Ruth candy bar. Product placement is alive and well.
Once Sloth yanks the chains out of the wall and frees his new friend, they head into the tunnels—Chunk because he wants to find and save his friends; Sloth… probably because he's gotten really used to hanging out in cold, dark, underground places.
We lose track of these two for much of the film, but they suddenly reappear when they're needed most. Sloth, with Chunk on his back, knifes through the mast of Willy's ship, rescuing the other Goonies and facing his family head-on. He knocks out and ties up his brothers, then tosses his mother into the lagoon.
After making sure that all the Goonies have escaped from the collapsing cave, Sloth also makes it to shore. Chunk declares that he is now going to live with him, and Sloth has no objections. He's bound to be disappointed, however, once he learns they can't just eat chocolate bars for every meal.