Cook and Yorke definitely gave some reason for optimism for both of them next year, I'm super high on Yorke already but Cook has some nice pop as well. Both are striking out way too much in their short time up but you can see the power with both of them. I bet Yorke claims a full time role out of camp but I'm curious to see how Cook does.
Also nice to see Burrows putting in some decent innings to end the year too, they really need bullpen help next year and I feel Burrows makes a lot more sense as a reliever long-term. I'd be moving on from Bednar and trying to use his money plus Chapman's to sign the best closer I can get, and then try to bring in another 1 or 2 Holderman/Mlodzinski caliber relievers if possible. I think Holderman, Mlodzinski and Nicolas are all safe pieces to pencil into their bullpen for next year, but they need a lot more than just 3 guys. Their rotation is likely set (Skenes, Keller, Jones, Ortiz and Falter) but they need to add some significant bullpen help. Dennis Santana has been terrific for the Pirates but I'm not buying that as a long-term thing.