This thread got me thinking about how to value an elite reliever vs a position player(s). This was an interesting bit from a Fangraphs article about the Chapman trade from 2016 https://blogs.fangraphs.com/valuing-relievers-correction-or-bubble/: By our current valuation methods, the game’s elite relievers are worth about +2 WAR in the regular season, but as Sullivan showed, teams with those kinds of elite relief performances generally win about 1.7 games more than we’d expect, so you could argue that perhaps these guys are worth closer to +4 WAR, if the team’s clutch performance was solely due to having a great reliever. Obviously this does not take into account the contract of the reliever or years of control which is a HUGE deal when evaluating a trade. Also positional performance volatility has to be taken into account and relievers tend to be a volatile group. Digging a littler further I found this from a Forbes article https://www.forbes.com/sites/tonyblengino/2019/11/21/the-brewers-should-at-least-entertain-trade-offers-for-josh-hader-this-off-season/#4709ed375bda Hader is under team control for four arbitration seasons, and will earn over $30M over that span if he remains healthy and effective. If he pitches at his 2019 level, he could deliver as much as $80M in value over that span, for a total of $50M excess value. That’s nothing to sneeze at. That’s the potential reward. The risk, however, is immense. One would think that $50M in excess contract value would land Hader on Fangraphs’ annual Top 50 Trade Value list. He only made the Honorable Mentions, however. Reliever performance, as you might surmise, is extremely volatile. Hader ranked 3rd in reliever WAR in both 2018 and 2019. Going back to 2017, he is the only reliever to repeat among the top five. That’s right - there are 14 different relievers among the 15 top relief performances over the last three seasons. I put this all out there not to suggest the Brewers should trade Hader but more to see if we can come to some kind of consensus (good luck) on value.