Ground game
69 BCompetent offensive grappling — enough volume and threat to change where the fight is scored.
- 3.82 takedowns / 15 at 59% accuracy
- 0.48 submission attempts / 15 · 8 career sub wins
Heavyweight
“Polar Bear”
18-6
SLpM
3.57
SApM
7.30
Str Acc
60%
Str Def
44%
TD Avg
3.82
TD Acc
59%
TD Def
70%
Sub Avg
0.48
Hybrid who can change levels — porous pocket
Fight IQ
Built from FightMetric rates, method shares, and 6 loaded UFC rows. Timing and agility are tape proxies, not lab measurements.
IQ
Ground
Defense
Counter
Reaction
proxy
Agility
proxy
TD react
Chin
No standout plus-mark on this card.
Striking defense
Defensive liability. Opponents land at a clip that turns every exchange into a finish window.
Timing & reaction
Late on the read. High absorb or a leaking TD defense suggests the first move often belongs to the opponent.
Punching agility
Heavy or economical. Combinations are chosen, not sprayed — opponents can time the entries.
Serghei Spivac “Polar Bear” is a 31-year-old Orthodox heavyweight out of Moldova, camped at Polar Bear Team. The tape read: hybrid who can change levels — porous pocket. Career mark 18-6-0 — 5 by KO/TKO, 8 by submission, 5 by decision. Fight IQ grades B (69).
What works. Ground game is the standout at 69 (B). Competent offensive grappling — enough volume and threat to change where the fight is scored. Ground game B on 3.82 TD/15 and 0.48 sub attempts. Striking defense D at 44% / 7.30 SApM. Counter punching D; punching agility D (output × accuracy × age curve). Takedown reaction C+ on 70% TD defense. These are tape proxies — not lab reaction times — built from FightMetric rates, finish shares, and 6 loaded UFC rows.
Where it breaks. Striking defense is the soft spot (27, D). Defensive liability. Opponents land at a clip that turns every exchange into a finish window. Opponents who draw them into the pocket and throw with bad intentions have historically been the ones who make this résumé leak. Losses lean decision more often than a highlight — the issue is usually control of minutes, not a glass jaw.
Recent tape (6 bouts): W 3041315 (Decision - Unanimous R3) · L Acosta (Decision - Unanimous R3) · L 4873640 (KO/TKO R1) · W 3093559 (Submission R1) · L Gane (KO/TKO R2). Form index negative over the last 5. 1 of those wins reached the championship minutes — cardio and late IQ are real.
Competent offensive grappling — enough volume and threat to change where the fight is scored.
Defensive liability. Opponents land at a clip that turns every exchange into a finish window.
Limited counter threat. Opponents can miss without paying a finishing tax.
Late on the read. High absorb or a leaking TD defense suggests the first move often belongs to the opponent.
Heavy or economical. Combinations are chosen, not sprayed — opponents can time the entries.
Hips arrive late. A committed wrestler will get them down; the question is what happens next.
Finishable. When this fighter loses, it is usually because something landed flush or the neck gave out.
| Date | Opponent | Res | Method | Rnd | Sig |
|---|---|---|---|---|---|
| Feb 22, 2026 | Fighter 3041315 | W | Decision - Unanimous | 3 5:00 | 67/149 |
| Jun 8, 2025 | Waldo Cortes Acosta | L | Decision - Unanimous | 3 5:00 | 48/119 |
| Jan 19, 2025 | Fighter 4873640 | L | KO/TKO | 1 4:53 | 15/28 |
| Aug 10, 2024 | Fighter 3093559 | W | Submission | 1 1:44 | 3/5 |
| Sep 2, 2023 | Ciryl Gane | L | KO/TKO | 2 3:44 | 11/44 |
| Feb 5, 2023 | Derrick Lewis | W | Submission | 1 3:05 | 12/21 |