I have posted before on this. The idea is to find players who led their
league in a speed stat, a power stat and an on-base stat in the same
year.
These are the stats I used:
Speed (triples, SBs, SB%)
Power (SLG, ISO, HRs, TBs, extra-base hits)
Getting on base (OBP, times on base)
Recently I searched for leaders in XBT% who might qualify. XBT% is the percentage of times a runner advanced more than one base on a single or more than two bases on a double.
Acuna led the NL in a speed stat (SB, 73), an on-base stat (OBP .416, times on base, 306) and a power stat (TB, 383)
See Triple Threat Triple Crowns to see all of the past winners. Also see Newly discovered "triple threat" triple crowns using XBT%.