This post will provide you multiple resources to discover more information about the Memphis Showboats.  The team played in the United States Football League during the 1984 and 1985 USFL seasons:

• Memphis Showboats on Squidoo
• Memphis Showboats on OursportsCentral
• Memphis Showboats on USFL.info
• Memphis Showboats on Remembertheusfl

The Memphis Showboats, who played in the 1984 and 1985 USFL seasons, actually had 3 different logos. For the two seasons in which they played, the helmets used the “half-paddlewheel” logo for the helmet decal. Had the Showboats played in the fall of 1986 then they may have used one of their alternate logos.

Here is a link which shows all 3 Memphis Showboats logos, and it also shows photos of Showboats sideline jackets used during actual USFL games: http://www.usfl.info/showboats/archives.html