Top seasons by age

Yesterday's post on the best and worst age 27 seasons in Royals history got me wondering about the best performance's of all ages, well just 20-40 actually. That post only took offense into consideration but this time I wanted to incorporate defense so instead of using OPS+ I've opted for b-ref's wins above replacement, this altered the results dramatically and enabled Joe Randa to make an appearance. However, I did use OPS+ as a tie breaker in two cases. The minimum plate appearances is once again set at 400.
Any guesses on how many times George Brett appears?

Age	Player	WAR	HR	RBI	BA	OBP	SLG	OPS+
20*	Clint Hurdle	1.6	7	56	.264	.348	.398	108
21*	George Brett	0.8	2	47	.282	.313	.363	91
22	George Brett	5.1	11	89	.308	.353	.456	125
23	George Brett	8.0	7	67	.333	.377	.462	144
24	Willie Wilson	7.8	3	49	.326	.357	.421	113
25	Al Cowens	5.1	23	112	.312	.361	.525	137
26	George Brett	8.7	23	107	.329	.376	.563	148
27	George Brett	9.6	24	118	.390	.454	.664	203
28	Mike Sweeney	4.7	24	86	.340	.417	.563	148
29	George Brett	5.8	21	82	.301	.378	.505	141
30	Hal McRae	5.4	8	73	.332	.407	.461	153
31	Amos Otis	7.5	22	96	.298	.380	.525	150
32	George Brett	8.0	30	112	.335	.436	.585	178
33	Frank White	3.5	17	56	.271	.311	.445	107
34	Joe Randa	2.7	8	56	.287	.343	.408	94
35	George Brett	5.2	24	103	.306	.389	.509	149
36	Hal Mcrae	4.0	27	133	.308	.369	.542	147
37	George Brett	4.6	14	87	.329	.387	.515	153
38	Frank White	1.5	2	36	.256	.307	.328	80
39*	George Brett	0.0	7	61	.285	.330	.397	102
40*	George Brett	-0.4	19	75	.266	.312	.434	94

* Indicates only one eligible player

So yeah, George Brett was pretty good. I'd like to do this with pitchers too but I wouldn't mind if another Royals blogger beat me to it (I'm looking at you McGannon).