I am finding this one a bit tricky. I don't like Gardner but I do respect Mariano. If you want to improve your OF alone trading these two for Holliday isn't a bad idea. Capps is worthless. In the other two deals both Bourn and Choo are risky - Bourn because his value is speed alone and Choo coming off the injury. Also both closers are risky - compared to Mariano. Motte is unproven and Marmol is either unhittable or uncatchable. If you don't need to replace the closer then getting Holliday seems the best move. If the closer matters more to you then keep Rivera.