I decided to complement a great new series on MLBTradeRumors by rating each GM’s listed trades by bWAR. I only count WAR for the years that the players accumulated on their acquiring teams while under the team control at the time of the trade. In other words, I didn’t count any years added by new contracts or spent on other teams after subsequent trades. A positive or negative WAR is the result of the difference between the combined WAR for both sides as it pertains to Dombrowski’s one. The MLBTR article is here.
2015 SEASON
2015-2016 OFFSEASON
TRADE #1: +0.7 WAR
TRADE #2: -0.3 WAR
TOTAL: +0.4 WAR
2016 SEASON
TRADE #1: 0.0 WAR
TRADE #2: 0.0 WAR
TRADE #3: +0.9 WAR
TRADE #4: +3.9 WAR
TRADE #5: +0.7 WAR
TOTAL: +5.5 WAR
2016-2017 OFFSEASON
TRADE #1: -6.7 WAR
TRADE #2: +7.5 WAR
TRADE #3: +0.4 WAR
TOTAL: +1.2 WAR
2017 SEASON
TRADE #1: +1.1 WAR
TRADE #2: +1.1 WAR
TRADE #3: -0.1 WAR
TOTAL: +2.1 WAR
2017-2018 OFFSEASON
TRADE #1: 0.0 WAR
TRADE #2: 0.0 WAR
TOTAL: 0.0 WAR
2018 SEASON
TRADE #1: +1.9 WAR
TRADE #2: +0.3 WAR
TRADE #3: -0.8 WAR
TOTAL: +1.4 WAR
2018-2019 OFFSEASON
2019 SEASON
TRADE #1: +0.9 WAR
TRADE #2: -0.2 WAR
TOTAL: +0.7 WAR
TOTAL: +12.2 WAR
MLB & FANTASY BASEBALL ANALYZED 
This exercise is fairly pointless if it doesn’t take into account years of control and player cost. Otherwise every “win now” trade in the past 2 years, where a team gets a star but gives up prospects, is going to look like a huge win, since the prospects haven’t had much of a chance to contribute yet.
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It does take into account both, as only years of Major League production under the service time/contract trades to the acquiring team is considered. It also only rates how the trade looks as of the time of the post. A lot of these prospects may never make it to the Majors or will be busts, while others will potentially be stars themselves. At the moment of a star helped his new team while the prospects are yet to help the old one, then the rating is fair. These WAR ratings are therefore not final.
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