Hello, first post! Not sure if everyone saw, but paul_met over at romhacking released wide mode hacks for NHL 94/95/96/97 & 98, these are not widescreen hacks, but wide mode hacks, which change the game resolution from 256x224 to 320x224, still a native Genesis resolution, so it still works in all the usual Genesis emulators.
The attached widemode.7z (updated) below includes the patches themselves and pre-patched roms:
Patches can be also found on: meduza-team.ucoz.net
* note: the nhl 94 patch doesn't work on expanded 2MB roms yet, needs adaptation
widemode.7z