I don't particularly like Lopez but he would be a significant upgrade over Amir if we could get him relatively cheap. I know Lopez's injury history but that doesn't make him injury prone. He's been pretty healthy for the past 2.5 seasons. Horford has a similar injury history only playing 11 games in 2011-12 and 29 games in 2013-14 because of torn pectoral muscles and Ainge signed him to a 4 year MAX deal. I don't see anyone on here calling Horford injury prone.
A broken chair would be a significant upgrade over Amir, but you don't have to pay a broken chair $22 million per.
Lopez is a guy who has averaged 6 rpg in 30+ minutes twice in his career, and is on track for a career-low 5.2 this year. He also
averaged 3.5 DReb in 35 (!!!) mpg in 2010-11. All this while being 7'0, 275 lbs.
How any self-respecting NBA team wants to pay him is beyond me. I would't touch him with a 10-foot pole if the Nets were paying to get rid of him.