When we are talking about sample size, it's well established that a one-year worth of stats isn't really large enough to evaluate player's true abilities. (Otherwise SCEA would just use one-year stats, not weighted 3-year average, to rate all players.)
I'll just give you an example how minor league stats could be useful to evaluate talents.
This player kinda struggled to stay at the MLB level for a few years, but in those four years he accumulated enough playing time to collect about a one-year worth of stats.
Code:
Year Age Tm Lg G PA AB R H 2B 3B HR RBI SB CS BB SO BA OBP SLG OPS OPS+ TB GDP HBP SH SF IBB Pos Awards
1985 21 TOR AL 30 81 74 6 23 4 0 4 16 0 0 6 16 .311 .358 .527 .885 135 39 2 0 0 1 0 3
1986 22 TOR AL 34 90 83 7 13 2 0 4 13 0 0 6 27 .157 .222 .325 .548 45 27 3 1 0 0 0 D/357
1987 23 TOR AL 82 197 175 30 47 7 1 14 32 0 1 20 48 .269 .345 .560 .905 133 98 6 1 0 1 2 D3/5
1988 24 TOR AL 74 190 174 24 40 6 1 9 23 0 1 14 53 .230 .289 .431 .721 100 75 6 1 0 1 0 D3/54
You can see some flash of brilliance (he has some pop... hits some HRs.... look at 1987 haha), but other than that nothing really special.
When you look at his minor league stats, however, you can see that he's actually a decent prospect.
Code:
Year Age Tm Lg Lev Aff G PA AB R H 2B 3B HR RBI SB CS BB SO BA OBP SLG OPS TB GDP HBP SH SF IBB
1982 18 Butte PION Rk KCR 69 319 273 73 88 28 0 20 68 3 0 37 62 .322 .417 .645 1.062 176 8 0 1 7
1983 19 Florence SALL A TOR 140 567 500 81 156 28 2 16 94 2 2 58 90 .312 .387 .472 .859 236 5 1 3 2
1984 20 2 Teams 2 Lgs AA-A TOR 125 517 458 75 123 24 3 28 93 2 2 50 92 .269 .339 .517 .857 237 2 1 6 10
1985 21 Knoxville SOUL AA TOR 96 414 361 52 106 26 2 18 81 0 0 45 83 .294 .372 .526 .898 190 3 0 5 3
1986 22 Syracuse IL AAA TOR 88 363 325 47 91 13 3 18 68 0 0 32 91 .280 .347 .505 .852 164 3 0 3 3
He struggled enough to end up playing in Japan for a year. But when he came back
Code:
1990 26 DET AL 159 673 573 104 159 25 1 51 132 0 1 90 182 .277 .377 .592 .969 167 339 15 5 0 5 11 *3D ASMVP-2SS
1991 27 DET AL 162 712 624 102 163 25 0 44 133 0 0 78 151 .261 .347 .513 .860 133 320 17 6 0 4 12 *3D ASMVP-2SS
1992 28 DET AL 155 676 594 80 145 22 0 35 124 0 0 73 151 .244 .325 .458 .783 118 272 14 2 0 7 8 *3D MVP-9
1993 29 DET AL 154 672 573 80 153 23 0 30 117 0 1 90 125 .267 .368 .464 .832 124 266 22 4 0 5 15 *3D ASMVP-24
1994 30 DET AL 109 481 425 67 110 16 2 28 90 0 0 50 110 .259 .337 .504 .840 114 214 17 2 0 4 4 *3/D
1995 31 DET AL 136 578 494 70 120 18 1 31 82 0 1 75 116 .243 .346 .472 .818 111 233 17 5 0 4 8 3D
1996 32 TOT AL 160 688 591 85 149 20 0 39 117 2 0 87 139 .252 .350 .484 .834 108 286 18 5 0 5 12 3D
1997 33 NYY AL 98 425 361 40 94 15 0 13 61 0 0 51 87 .260 .358 .410 .768 101 148 14 7 0 6 3 D/3
1998 34 TOT AL 117 476 416 49 97 17 1 17 68 0 1 53 111 .233 .324 .401 .725 86 167 18 4 0 3 1 3D
13 Yrs 13 Yrs 13 Yrs 13 Yrs 1470 5939 5157 744 1313 200 7 319 1008 2 6 693 1316 .255 .345 .482 .827 119 2484 169 43 0 46 76
He ended up being quite a monster.
.... and this is Cecil Fielder, father of Prince.
in this case, what should SCEA do to create Cecil Fielder prior to his 1990 season? Using just his MLB stats from prior years would make him a one-tool guy with limited service time, which isn't really Fielder was in 1990.
Using minor league stats could help to evaluate him more appropriately in a case like this.