Here is the tentative 1997 MLS/A-League affiliation alignment between the two leagues.
Columbus Crew — Charleston Battery, Milwaukee Rampage
Colorado Rapids — Atlanta Ruckus, Colorado Foxes
Dallas Burn — El Paso Patriots, New Orleans Riverboat Gamblers
Kansas City Wizards — Carolina Dynamo, Orlando Sundogs*
Los Angeles Galaxy — Minnesota Thunder, Orange County Zodiac
MetroStars — Long Island Rough Riders, Rochester Rhinos
New England Revolution — Connecticut Wolves, Worcester Wildfire, Raleigh Flyers*
San Jose Clash — California Jaguars, Seattle Sounders
Tampa Bay Mutiny — Jacksonville Cyclones, Nashville Metros
Washington D.C. United — Hershey Wildcats, Richmond Kickers
*-tentative alignment