Absent any context, this is another fine move. McDonald can help in the rotation soon and Lambo is only 22 and has some upside. He was once regarded as one of the organization's top prospects, but his stock has slipped a bit since flatlining at Class AA and getting suspended for drug use. But he's still only 21, and he skipped a level to get to Class AA in the first place. If Neil Walker can put together a career after struggling in the high minors, Lambo can too, especially given that he's younger than Walker and his struggles have arguably been less severe.