Here are the WHIPS for the staff my son's senior season along with what they did in and past HS along with their peak velocities in HS:
1.2 good lefty pitcher even better as senior (80+ mph), D1 outfielder
2.5 limited innings (84 mph), D3 outfielder/injured
1.54 #1 reliever w/ high ERA (upper 70s), Cut early from D3 as pitcher
1.51 staff ace, co-pitcher of year w/2nd round draft choice (87mph lefty), JC and D1 pitcher
1.47 mediocre starter(83 mph)probably tore UCL, DNP in college
1.4 very good pitcher next season (87 mph), lower tier D1 pitcher probably could have been mid to upper.
3.0 Limited innings in HS wild, but 1 bad inning threw off stats some (90+ mph), D1 pitcher
2.0 Limited innings 85+ mph, DNP in college to pursue academics
1.0 Very limited innings (87+ mph), turned down D1 walk-on for JC pitching, injured switched to track & field.
These all pitched in one of the country's best HS leagues. I can't see any correlation with WHIP to speak of. The kids with the better fastballs went on to pitch in college. It was as simple as that.