I'm going to say Lelie, with about 1125 receiving yards and 8 touchdowns.
Although if a league does not give many points on yards, then Chambers is probably the better player to own...
...simply because Lelie has too many boring 3 catch, 54 yard games. He never has huge weeks. Not really fun to own on your fantasy squad.
Chambers has 9 or 10 touchdown potential, although he's never had a 1,000 yard season. QB problems won't increase his yardage, but his touchdowns will still be great with an improved (hopefully) running game.