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UFC simulation vs. the market Bout Simulator
RJ Harris
Heavyweight · “The Hammer”

RJ Harris

1-1-0
Positional Grappler Precision Striker
6'3"Height
78"Reach
OrthodoxStance
28Age
1KO wins
0Sub wins
100.0%Finish rate
2:19Avg fight

Skill profile

Rated 0–100 · where 138 MMA has read him, his grades and tags set each axis and the stats only nudge inside his band · stats alone where he is silent · the rim is reserved for specialists
Striking — Below avg, rated 43 of 100 · 138 MMA whiteboard: striking decent · Oct 2026 · stats read 43 → nudged +1 inside the band · claims striking power +1, striking volume -2, striking technique +2 (+3) Accuracy — Average, rated 46 of 100 · claims striking technique +2 (+4) Striking D — Weak, rated 13 of 100 · stats only — nothing in his reads bears on this axis Durability — Weak, rated 12 of 100 · stats only — nothing in his reads bears on this axis Wrestling — Weak, rated 16 of 100 · claims clinch +2 (+2) TD Defense — Below avg, rated 43 of 100 · stats only — nothing in his reads bears on this axis Grappling — Below avg, rated 42 of 100 · 138 MMA whiteboard: grappling decent · Oct 2026 · stats read 34 → nudged -2 inside the band · tag sub threat: good (+3) · claims sub offense +1 (+2) Control — Average, rated 47 of 100 · claims top control +1 (+4) Striking Accuracy Striking D Durability Wrestling TD Defense Grappling Control
striking decent whiteboard
2 analyst reads graded this phase
  • decent UFC Fight Night Allen vs Duncan Full Card Preview & Predictions · October 4, 2026 · whiteboard watch ↗
  • decent UFC Fight Night: Du Plessis vs Usman · July 12, 2026 watch ↗
grappling decent whiteboard
2 analyst reads graded this phase
  • decent UFC Fight Night Allen vs Duncan Full Card Preview & Predictions · October 4, 2026 · whiteboard watch ↗
  • good UFC Fight Night: Du Plessis vs Usman · July 12, 2026 watch ↗
wrestling not yet read
cardio not yet read
durability not yet read
striking decent 2 reads · whiteboard
grappling decent 2 reads · whiteboard
wrestling not yet read
cardio not yet read
durability not yet read

138 MMA anchors Striking, Grappling · his tags and claims adjust Accuracy, Wrestling, Control · stats alone on Striking D, Durability, TD Defense.

Built on 4 minutes of tracked cage time across 2 statted fights — every axis is held down until there is more tape, so read this as a sketch rather than a verdict.

Positional Grappler average control — rates 47 of 100 · claims top control +1 (+4)
Precision Striker average accuracy — rates 46 of 100 · claims striking technique +2 (+4)
Career rates — the raw numbers behind the chart
Sig. strikes landed / min7.53
Sig. strikes absorbed / min10.97
Striking accuracy42.7%
Striking defense36.3%
Knockdowns / 15 min3.23
Takedowns / 15 min0.0
Takedown accuracy—
Takedown defense—
Sub attempts / 15 min0.0
Control time3.9%
Record vs .500+ opponents0-0

Insider info

2 analyst reads · 138 MMA · our paraphrase, never his words
vs AJ Frye lean UFC Fight Night Allen vs Duncan Full Card Preview & Predictions · October 4, 2026
strikingdecent grapplinggood

probably win more often

Harris is framed as the bigger, more patient power fighter with a dangerous knee down the center, backed by good submissions, top pressure, and cage control against a less proven but technically sound opponent.

Strengthpower, size
Strengthpatient approach
Strengthknees down the center
Strengthgood submissions
Strengthtop pressure/cage control
sub threat · good
vs Alvin Hines lean UFC Fight Night: Du Plessis vs Usman · July 12, 2026 · 1 read since
strikingdecent grapplinggood

Picked against, with the analyst noting the size and reach are real advantages but flagging that he can lean on them as a crutch.

A short-notice debutant, unusually large even for the heavyweight division at roughly 6'6" with an 80-inch reach. Decent enough striker with real power given his size, good knees that reach the head quickly because of his height, and enough patience to stay outside and let opponents walk into shots -- though patience can mean low volume. Good enough grappler with pretty good top pressure and a habit of attacking submissions from there; his cage push can stall out at times.

Strengthreal size and reach advantage for the division
Strengthgood knees that reach the head quickly given his height
Strengthpretty good top pressure with submission attacks from there
Weaknesscan rely on natural size advantages as a crutch
Weaknesspatience can tip into low output
range · long

Fight history

2 UFC bouts · newest first · opponent records as of fight night
L Allen Frye Jr. 0-1 walk-in KO/TKO · R1 2:59 — UFC Fight Night: Allen vs. Duncan · October 10, 2026
20/56Sig. strikes
40/55Absorbed
0/0Takedowns
0:01Control
0Knockdowns
0Sub attempts
W Alvin Hines 0-1 walk-in KO/TKO · R1 1:40 — UFC Fight Night: Du Plessis vs. Usman · July 18, 2026
15/26Sig. strikes
11/25Absorbed
0/0Takedowns
0:10Control
1Knockdowns
0Sub attempts

Walk-in records count UFC bouts in this database. For the pre-UFC career, see the record breakdown below or the Tapology button up top.

Record breakdown

UFC bouts in this database
1-1-0UFC record

Wins by method

KO/TKO 1
Submission 0
Decision 0
Other 0

Losses by method

KO/TKO 1
Submission 0
Decision 0
Other 0

Fights by organization

UFC 2

Showing UFC fights only — this fighter's full pre-UFC career hasn't been synced yet. It will fill in as the weekly career backfill reaches them.

Division context

vs. 100 qualified Heavyweight fighters · tick = division mean
Striking volume /min 7.5 avg 3.4
Strikes absorbed /min 11.0 avg 3.3
Striking accuracy 42.7% avg 49.5%
Striking defense 36.3% avg 52.1%
Takedowns /15 min 0.0 avg 1.2
Sub attempts /15 min 0.0 avg 0.4
Control time 3.9% avg 21.4%
Finish rate 100.0% avg 63.7%

Headshot of RJ Harris by UFC · Official UFC athlete photo (copyright UFC; not freely licensed) · Wikimedia Commons · flattened onto dark background, cropped/resized