Macy Chiasson

Where the 1548.1 rating comes from

From 14 bouts played between 30 November 2018 and 28 February 2026, and from them alone. Every line below was written at computation time: nothing is recomputed to show this page.

How to read this

On the right: the change this bout produced, then the value before → after. A line's arrival value is the next line's starting value, down to the starting rating given to every newcomer. A ±0.0 is a counted bout that did not move the rating, a walkover for instance.

14 bouts, from the most recent to the first

beaten by Ailín Pérez
28/02/26 · UFC Fight Night: Moreno vs. Kavanagh · preliminary card · detail
−10.91559.1 → 1548.1
beaten by Yana Santos
04/10/25 · UFC 320 · early preliminary card · detail
−14.01573.0 → 1559.1
beaten by Ketlen Vieira
31/05/25 · UFC on ESPN: Gamrot vs. Klein · main card · detail
−12.11585.2 → 1573.0
29/06/24 · UFC 303 · main card · detail
+11.01574.2 → 1585.2
16/03/24 · UFC Fight Night: Tuivasa vs. Tybura · main card · detail
+22.71551.5 → 1574.2
beaten by Irene Aldana
10/09/22 · UFC 279 · main card · detail
−25.31576.8 → 1551.5
07/05/22 · UFC 274 · preliminary card · detail
+24.01552.8 → 1576.8
18/12/21 · UFC Fight Night: Lewis vs. Daukaus · preliminary card · detail
−24.51577.3 → 1552.8
20/03/21 · UFC on ESPN: Brunson vs. Holland · preliminary card · detail
+20.11557.2 → 1577.3
15/02/20 · UFC Fight Night: Anderson vs. Błachowicz 2 · preliminary card · detail
+21.51535.6 → 1557.2
beaten by Lina Länsberg
28/09/19 · UFC Fight Night: Hermansson vs. Cannonier · preliminary card · detail
−28.31563.9 → 1535.6
04/05/19 · UFC Fight Night: Iaquinta vs. Cowboy · preliminary card · detail
+19.11544.8 → 1563.9
02/03/19 · UFC 235 · early preliminary card · detail
+20.81524.0 → 1544.8
30/11/18 · UFC The Ultimate Fighter: Heavy Hitters — The Ultimate Fighter 28 Finale · main card · detail
+24.01500.0 → 1524.0

Only the bouts the source publishes appear; what is missing is listed. The source gives the day, not the hour: two bouts on the same day are ordered by a reproducible rule, which is not necessarily the real order.