Fantasy MLB: Top 5 Weekly Boom and Bust Players

In our regular season start/sit advice column we use our projections to tell you when you may want to sit a highly rated player and start a lowly rated player. We reviewed the season to identify players who have high boom rates and high bust rates. To determine if a player had a boom week we take that player's rank for the week and see if it is numerically 50% of his overall weekly average. A player who averages to be the 50th best player at his position would need to finish the week Top 25 to qualify. To qualify as a bust week, it has to be one where the weekly ranking is 50% higher than the normal average. So a Top 20 player finishing 30th or worse.

Yulieski Gurriel had a weekly average first baseman rank of #17 but he also had the highest rate of finishing significantly better than that. He had 11 weeks out of 27 where he delivered a big performance. Another player with a high boom rate is Gleyber Torres who leads the second baseman position. Michael Chavis, in an average week, is the #19 third baseman but he also has the highest bust rate at the position. In his 17 weeks, 4 were bad, busts. Players like Paul Goldschmidt and Didi Gregorius are two of 10 players below who appear in both the boom and bust lists. These are the players who you'll want to carefully manage in terms of when to best start or sit because they rarely deliver an 'average' performance. The table below shows the player with the five highest boom and bust rates. The rank is based on the player's average position rank per week and not their season total fantasy points.

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HIGHEST BOOM% STARTING PITCHERSHIGHEST BUST% STARTING PITCHERS
Zack Greinke (#26 SP, 44% 12 of 27 Weeks)Trevor Bauer (#40 SP, 42% 11 of 26 Weeks)
Jacob deGrom (#26 SP, 38% 10 of 26 Weeks)Reynaldo Lopez (#45 SP, 41% 11 of 27 Weeks)
Max Fried (#32 SP, 38% 10 of 26 Weeks)Kyle Hendricks (#36 SP, 39% 9 of 23 Weeks)
Joe Musgrove (#39 SP, 36% 9 of 25 Weeks)Marco Gonzales (#38 SP, 38% 10 of 26 Weeks)
Kyle Hendricks (#36 SP, 35% 8 of 23 Weeks)Masahiro Tanaka (#38 SP, 37% 10 of 27 Weeks)
HIGHEST BOOM% CATCHERSHIGHEST BUST% CATCHERS
Gary Sanchez (#13 C, 46% 11 of 24 Weeks)Travis d'Arnaud (#17 1B, 28% 7 of 25 Weeks)
Willson Contreras (#10 C, 41% 9 of 22 Weeks)James McCann (#15 C, 26% 7 of 27 Weeks)
Yadier Molina (#13 C, 38% 8 of 21 Weeks)Josh Phegley (#18 C, 24% 6 of 25 Weeks)
Omar Narvaez (#14 C, 37% 10 of 27 Weeks)Yadier Molina (#13 C, 24% 5 of 21 Weeks)
James McCann (#15 C, 30% 8 of 27 Weeks)Omar Narvaez (#14 C, 22% 6 of 27 Weeks)
HIGHEST BOOM% FIRST BASEMENHIGHEST BUST% FIRST BASEMEN
Yulieski Gurriel (#17 1B/DH, 41% 11 of 27 Weeks)Luke Voit (#22 1B/DH, 30% 7 of 23 Weeks)
Josh Bell (#14 1B/DH, 40% 10 of 25 Weeks)Paul Goldschmidt (#18 1B/DH, 30% 8 of 27 Weeks)
J.D. Martinez (#16 1B/DH, 37% 10 of 27 Weeks)Josh Bell (#14 1B/DH, 28% 7 of 25 Weeks)
Anthony Rizzo (#16 1B/DH, 37% 10 of 27 Weeks)Hunter Dozier (#19 1B/DH, 28% 7 of 25 Weeks)
Paul Goldschmidt (#18 1B/DH, 37% 10 of 27 Weeks)Yulieski Gurriel (#17 1B/DH, 26% 7 of 27 Weeks)
HIGHEST BOOM% SECOND BASEMENHIGHEST BUST% SECOND BASEMEN
Gleyber Torres (#14 SS, 37% 10 of 27 Weeks)Cavan Biggio (#17 2B, 37% 7 of 19 Weeks)
Cavan Biggio (#17 2B, 37% 7 of 19 Weeks)Robinson Cano (#20 2B, 27% 6 of 22 Weeks)
Starlin Castro (#16 2B, 33% 9 of 27 Weeks)Rougned Odor (#18 2B, 27% 7 of 26 Weeks)
Howie Kendrick (#18 1B, 32% 8 of 25 Weeks)Brian Dozier (#19 2B, 26% 7 of 27 Weeks)
Javier Baez (#14 SS, 32% 8 of 25 Weeks)Keston Hiura (#15 2B, 25% 4 of 16 Weeks)
HIGHEST BOOM% THIRD BASEMENHIGHEST BUST% THIRD BASEMEN
Nolan Arenado (#9 3B, 37% 10 of 27 Weeks)Michael Chavis (#19 1B, 24% 4 of 17 Weeks)
Matt Chapman (#12 3B, 37% 10 of 27 Weeks)Justin Turner (#15 3B, 23% 6 of 26 Weeks)
Renato Nunez (#16 3B, 33% 9 of 27 Weeks)Kyle Seager (#15 3B, 21% 4 of 19 Weeks)
Kris Bryant (#12 3B, 31% 8 of 26 Weeks)Miguel Sano (#15 3B, 20% 4 of 20 Weeks)
Jose Ramirez (#13 3B, 30% 7 of 23 Weeks)Austin Riley (#20 OF, 19% 3 of 16 Weeks)
HIGHEST BOOM% SHORTSTOPHIGHEST BUST% SHORTSTOP
Trea Turner (#14 SS, 41% 9 of 22 Weeks)Eric Sogard (#21 2B, 36% 8 of 22 Weeks)
Francisco Lindor (#12 SS, 38% 9 of 24 Weeks)Didi Gregorius (#22 SS, 29% 5 of 17 Weeks)
Paul DeJong (#17 SS, 37% 10 of 27 Weeks)Lourdes Gurriel (#19 OF, 29% 5 of 17 Weeks)
Lourdes Gurriel (#19 OF, 35% 6 of 17 Weeks)Tommy Edman (#20 SS, 29% 5 of 17 Weeks)
Didi Gregorius (#22 SS, 35% 6 of 17 Weeks)Adalberto Mondesi (#22 SS, 29% 6 of 21 Weeks)
HIGHEST BOOM% OUTFIELDERHIGHEST BUST% OUTFIELDER
Yordan Alvarez (#28 OF, 47% 8 of 17 Weeks)Derek Dietrich (#65 OF, 48% 12 of 25 Weeks)
Bryan Reynolds (#38 OF, 42% 10 of 24 Weeks)Franmil Reyes (#47 OF, 44% 12 of 27 Weeks)
Bryce Harper (#30 OF, 41% 11 of 27 Weeks)Hunter Renfroe (#54 OF, 42% 11 of 26 Weeks)
Christian Yelich (#26 OF, 40% 10 of 25 Weeks)Albert Almora (#68 OF, 42% 11 of 26 Weeks)
George Springer (#24 OF, 39% 9 of 23 Weeks)Joc Pederson (#47 OF, 41% 11 of 27 Weeks)
HIGHEST BOOM% RELIEVERSHIGHEST BUST% RELIEVERS
Raisel Iglesias (#41 RP, 56% 15 of 27 Weeks)Adam Cimber (#69 RP, 50% 13 of 26 Weeks)
Aroldis Chapman (#26 RP, 52% 14 of 27 Weeks)Derek Law (#76 RP, 50% 11 of 22 Weeks)
Roberto Osuna (#29 RP, 50% 13 of 26 Weeks)Ty Buttrey (#65 RP, 48% 13 of 27 Weeks)
Brad Hand (#30 RP, 48% 12 of 25 Weeks)Jairo Diaz (#60 RP, 47% 9 of 19 Weeks)
Edwin Diaz (#43 RP, 46% 12 of 26 Weeks)Shawn Armstrong (#74 RP, 46% 11 of 24 Weeks)