Sure right now there wouldn't be a big dent in the bullpen if he was traded, but again he has performed when his number is called. Please don't tell me you believe Lopez can be as effective as Hader is right now. And no that is not why I said I wouldn't trade him. I said he would be (is) a key piece meaning I wouldn't trade him because of where he is now and what his ceiling is. He has performed when his number is called, despite the ridiculous number of walks but again, let's look at when he's been called upon. Game 1: Brewers are losing 3-2 to the Diamondbacks. To his credit, he didn't allow a run in his inning keeping the Brewers well within striking distance. Game 2: Came in with runners on 1st and 3rd with 2 outs and the Brewers leading 5-4. Threw two pitches and got out of the inning when Pina threw out Fowler trying to steal 2nd. He literally had to do nothing in this appearance despite pitching. Game 3: Pitched a scoreless 6th and 7th inning a tie game. The Brewers would end up scoring two in the 9th to secure a win. Maybe Blazek or Lopez give up a run or more if they were asked to pitch two innings in this situation. Maybe they pitch two scoreless innings. Game 4: Comes in with the Brewers trailing 7-2 and pitches two solid innings. Brewers end up losing 7-3. Game 5: Pitches a scoreless 7th with the Brewers trailing 3-1. Brewers end up losing 3-1. Game 6: Comes in with the Brewers trailing 3-2 and pitches two scoreless innings. Brewers end up tying the game at 3 but Knebel blows the game in the 8th and the Brewers end up losing 4-3. Game 7: Pitches a scoreless inning with the Brewers leading 7-4. Brewers end up winning 8-4. Game 8: Comes in with the Brewers trailing 3-2 after a rain delay. Gives up a homer to make it 4-2 but the Brewers come back and that's the only blemish in his three innings. This appearance might be difficult to replace but with Blazek starting in the minors, it's possible that he would be able to give us 3 innings if need be. Game 9: Comes in with the Brewers leading 9-6 with a runner on 3rd and 1 out. Strikes out the two batters he faces in the 7th to keep the run off the board. Walks the leadoff hitter in the 8th and gets taken out. It's nice that he didn't allow the runner on 3rd to score with 1 out but even if he (or any other pitcher) did, it's still a two run lead. Sorry, you're just going to have a really hard time convincing me that Hader isn't replaceable with the way he's being used now. That's not Hader's fault but he's also not an irreplaceable piece of the bullpen right now.