Some of the major league team rosters for 1994 are really thin - the Braves only used 30 guys all year! Also, there were only 114 rookie debuts in '94 compared to 203 in '93, 247 in '95, 194 in '96, and 180 in '97. Based on that, it looks like if the '94 season had continued, roughly 70 rookies who made their debuts in '95 would have been late-season call-ups in '94, and it would really help to pad out the rosters if we identified the most likely 70 or so rookies for any replayers who wanted to import them into '94 so they're available then.
So... there are
68 guys who made their debuts in April 1995, which only lasted a week because the season started late. I also count
76 guys making their debuts between August 12 and October 1 of 1993. Those two numbers are both pretty close to my estimate of 70 from the first paragraph. If I list the players who made their debuts in April 1995, that's a pretty good list of candidates to have appeared in '94 as late season call-ups.
Some of these guys switched teams during the '94-'95 offseason, mostly because they were taken in the Rule 5 draft in December, so I noted those.
ATL - Brad Clontz, Kevin Lomon (taken by Mets in Rule 5 draft), Jason Schmidt
BOS - Jeff Pierce, Frankie Rodriguez, Steve Rodriguez
CAL - Mike James, Troy Percival
CHC - Ozzie Timmons
CHW - James Baldwin, Ray Durham, Isidro Marquez
CLE - Jon Nunnally (taken by Royals in Rule 5 draft)
COL - Juan Acevedo, Roger Bailey, Jason Bates, Jorge Brito
DET - Ben Blomdahl, Bobby Higginson, Felipe Lira, Rudy Pemberton, Shannon Penn, Sean Whiteside
FLA - Mike Myers
HOU - Jim Dougherty
KCR - Chris Eddy (taken by A's in Rule 5 draft), Joe Randa, Dilson Torres, Michael Tucker, Joe Vitiello
LAD - Greg Hansell, Todd Hollandsworth, Noe Munoz, Antonio Osuna, Todd Williams
MIL - Steve Sparks
MIN - Marty Cordova, LaTroy Hawkins, Brad Radke
MON - Shane Andrews, Reid Cornelius, Mark Grudzielanek, Carlos Perez, Alberto Reyes (taken by Brewers in rule 5 draft), Curt Schmidt
NYM - Edgardo Alfonzo, Brook Fordyce, Ricky Otero, Quilvio Veras (traded to the Marlins in the offseason)
NYY - Brian Boehringer, Matt Dunbar (taken by Marlins in Rule 5 draft), Andy Pettitte
OAK - Don Wengert
PHI - Jeff Patterson (was sent to the Yankees in offseason as a PTBNL)
PIT - Jason Christiansen, Mark Johnson, Esteban Loaiza, Gary Wilson
SDP - Andres Berumen, Paul Menhart (not available in '94, he missed all that season with an injury)
SEA - Ron Villone
SFG - Chad Fonville (taken by Expos in Rule 5 draft), Chris Hook, Joe Rosselli
STL - Allen Battle
TEX - Jose Alberro, Wilson Heredia
TOR - Todd Steverson (taken by Tigers in Rule 5 draft)
If we want to bump the rookie pool up to 78, here are the next ten debuts, from May 1-4 of '95. Hideo Nomo is not included here because he was only signed by LA in February '95.
BAL - Vaughn Eshelman (taken by Red Sox in Rule 5 draft)
CIN - Matt Grott
CLE - David Bell
HOU - Dean Hartgraves
MIL - Scott Karl
MON - Tomas Perez (taken by Angels in Rule 5 draft)
OAK - Tanyon Sturtze (taken by Cubs in Rule 5 draft)
PIT - Angelo Encarnacion
STL - Terry Bradshaw
TOR - Freddy Garcia (taken by Pirates in Rule 5 draft)