Most replied to RBR threads in the history of ESB.

To date:

1. Usyk vs. Fury I/Opetaia vs. Breidis II - 4,745 replies
2. Joshua vs. Wallin/Wilder vs. Parker - 4,214 replies
3. Joshua vs. Usyk I - 3,490 replies
4. Usyk vs. Joshua II - 3,339 replies
5. Zhāng vs. Wilder - 3,160 replies
   
6. Pacquiao vs. Bradley I - 3,043 replies
7. Fury vs. Wilder III - 3,022 replies
8. Canelo vs. BJS - 2,867 replies
9. Madrimov vs. Crawford - 2,755 replies
10. Joshua vs. Parker - 2,748 replies
11. Joshua vs. Ngannou - 2,541 rplies
12. Mayweather vs. Guerrero - 2,334 replies
13. Bivol vs. Canelo - 2,328 replies
14. Mayweather vs. Maidana I - 2,265 replies
15. Ruiz vs. Joshua II - 2,263 replies
16. Mayweather vs. Cotto - 2,252 replies
17. Kovalev vs. Canelo - 2,205 replies
18. Usyk vs. Chisora - 2,139 replies
19. Spence vs. Crawford - 2,090 replies
20. Golovkin vs. Canelo II - 2,076 replies
21. Wilder vs. Fury I - 2,074 replies
22. Mayweather vs. Berto - 2,070 replies
23. Chisora vs. Parker - 2,034 replies
24. Usyk vs. Bellew - 2,031 replies
25. Haney vs. Lomachenko - 1,987 replies
26. Fury vs. Ngannou - 1,976 replies
27. Joshua vs. Povetkin - 1,975 replies
28. (Daniel) García vs. Morales - 1,951 replies
    
29. Mayweather vs. Pacquiao - 1,923 replies
30. Joshua vs. Helenius - 1,919 replies
31. Joshua vs. Ruiz I - 1,916 replies
32. Whyte vs. Parker - 1,884 replies
33. Golovkin vs. Jacobs - 1,855 replies
34. Fury vs. Chisora II - 1,813 replies
35. Povetkin vs. Whyte II - 1,796 replies
36. (Daniel) García vs. Peterson - 1,779 replies
    
37. Canelo vs. Trout - 1,750 replies
38. Mayweather vs. Canelo - 1,742 replies
39. JMM vs. Fedchenko - 1,716 replies
40. Cotto vs. Margarito II - 1,695 replies
41. Donaire vs. Rigondeaux - 1,678 replies
42. Ward vs. Kovalev II - 1,659 replies
43. Linares vs. Mitchell - 1,650 replies
44. Bute vs. Froch - 1,648 replies
45. Joyce vs. Dubois - 1,635 replies
    45. (tie) Cotto vs. Canelo - 1,635 replies
46. Lomachenko vs. López - 1,631 replies
47. Haney vs. (Ryan) García - 1,630 replies
48. Lomachenko vs. Campbell - 1,622 replies
49. Pacquiao vs. JMM IV - 1,610 replies
50. Kovalev vs. Ward - 1,603 replies
51. Brook vs. Spence - 1,600 replies
52. Canelo vs. Lara - 1,588 replies
53. Mayweather vs. Maidana II - 1,582 replies
54. Wilder vs. Fury II - 1,578 replies
55. Golovkin vs. Lemieux - 1,557 replies
56. Bradley vs. Provodnikov - 1,552 replies
57. Bradley vs. Pacquiao II - 1,550 replies ***
58. Crawford vs. Porter - 1,545 replies
59. Canelo vs. Charlo - 1,543 replies
60. Taylor vs. Prograis - 1,536 replies
61. Mayweather vs. McGregor - 1,525 replies
    61. (tie) Martínez vs. Chávez Jr. - 1,525 replies
62. Broner vs. Maidana - 1,517 replies
63. Whyte vs. Rivas - 1,511 replies
64. Golovkin vs. Canelo I - 1,489 replies
65. Usyk vs. Dubois - 1,487 replies
66. Kambosos vs. Haney - 1,485 replies
67. Joshua vs. Pulev - 1,482 replies
68. Shields vs. Marshall - 1,479 replies
69. López vs. Kambosos - 1,477 replies
    
70. Beterbiev vs. Yarde - 1,475 replies
71. Taylor vs. Serrano - 1,474 replies
72. Klitschko vs. Fury - 1,447 replies
    72. (tie) Joshua vs. Molina - 1,447 replies
73. Ward vs. Froch - 1,441 replies
74. Tarver vs. Kayode - 1,439 replies
75. Canelo vs. Jacobs - 1,420 replies
76. Tszyu vs. Fundora - 1,409 replies
77. Malignaggi vs. Broner - 1,407 replies
78. Haye vs. Bellew - 1,402 replies
79. Canelo vs. Smith - 1,396 replies
80. Wilder vs. Ortiz - 1,385 replies
81. Davis vs. (Héctor) García - 1,384 replies
82. Stiverne vs. Wilder I - 1,373 replies
83. Hopkins vs. Dawson II - 1,365 replies
84. Spence vs. (Miguel) García - 1,362 replies
85. Porter vs. Brook - 1,360 replies
86. Bivol vs. Sánchez - 1,355 replies
87. Froch vs. Groves I - 1,344 replies
88. Charlo vs. Castaño - 1,342 replies
89. Froch vs. Kesller II - 1,338 replies
90. Fulton vs. Inoue - 1,330 replies
    90. (tie) Pacquiao vs. Bradley III - 1,330 replies
91. Pacquiao vs. Broner - 1,329 replies
92. Salido vs. López - 1,320 replies
93. Canelo vs. Berlanga - 1,311 replies (as of this one)
94. Usyk vs. Gassiev - 1,309 replies
95. Groves vs. Eubank Jr. - 1,305 replies
    95. (tie) Jack vs. DeGale - 1,305 replies
96. Parker vs. Chisora II - 1,302 replies
97. Ugás vs. Pacquiao - 1,286 replies
    
98. Pacquiao vs. JMM III - 1,283 replies
99. Hopkins vs. Shumenov - 1,280 replies
100. Joshua vs. Whyte - 1,278 replies

*** Technically, between Bradley vs. Pacquiao II and Crawford vs. Porter you have the Lucian Bute vs. Edison Miranda thread at 1,549 replies - but it started out as just a preview/prediction thread and was put up 2 months before the fight. It does contain a few pages of what amounted to an on-the-fly RBR by committee, but eh, it already had a hundred page head start before the bell rang so this one could maybe slot in at #59 (sliding everything behind it down by 1) but would need to get a pretty big asterisk.

 

Interesting tidbits:

1. Canelo Álvarez reigns supreme (in terms of engagement) - #8, #13, #17, #20, #37-38, #45, #52, #59, #64, #75, #79 and #93, that last one as yesterday versus Berlanga ringing in his 13th appearance on the list.
   
   
2. Anthony Joshua is just behind Canelo, with a dozen: #2-4, #10-11, #15, #27, #30-31, #67, #72 and #100 - meaning one more addition will bump him down to 11, still good for a comfortable second place. Joshua has a record four top-10 instances as headliner.
   
   
3. Pacquiao has eight entries on the top hundred - occupying #6, #29, #49, #57, #90-91, and #97-98.
   
   
4. Mayweather is tied with his rival at eight - #12, #14, #16, #22, #29, #38, #53, and #61.
   Funny enough, the Mayweather vs. Pacquiao event at one time shattered records and held the #1 spot - but has now fallen to a mere 29.
   
   
5. Oleksandr Usyk appears seven times, at slots #1, #4, #5, #18, #24, $65 and #94. Worth noting that he is the only person appearing thrice in our top 5, with all three of those ahead of Canelo's highest entry.
   
   
6. Tyson Fury appropriately is sandwiched between the man that dethroned him and the man against whom the bulk of his legacy was carved going 2-0-1; in a three way tie with seven instances on the list. His are #1, #7, #21, #26, #34, #54, and #72.
   
   
7. Deontay Wilder also has seven, #2, #5, #7, #21, #54, #80 and #82.
   
   
8. Joseph Parker keeps up the strong HW representation with five: #2, #10, #23, #32, and #96.
   
   
9. Dereck Chisora, surprisingly for a non-champ, has managed four: #18, #23, #34, and #96.
   
   
10. Tim Bradley also has four, distributed at the low, middle and high end - #6, #56-57, and #90.
    
    
11. Carl Froch notched four of his own; #44, #73, #87, and #89.
    
    
12. Dillian Whyte makes the Four Club too - barely. He's got #32, #35, #63, and #100.
    
    
13. Gennady Golovkin, the last homegrown HBO Boxing superstar, sits at four with #20 #33 #55 and #64.

There's a many-ways tie with 3 - including Bud Crawford, Sergey Kovalev, Devin Haney, Miguel Cotto, Vasyl Lomachenko, JMM, Andre Ward, Errol Spence,

 

Not sure how that's germane? This is just raw data on, as stated, replies per thread. Had it been about pages, then maybe the 15 post to a page limit would bear mentioning.

 

IMO, as stated before, the only makeable bout that could break the 5k barrier is Usyk vs. Fury II - and it'll be at least a good few years before something else can.

 

Once upon a time a thousand replies automatically meant top 15. Now it might not rate top 150.