While Manziel has not yet played an NFL down or earned a starting spot, his sales come in ahead of Super Bowl-winning quarterbacks Russell Wilson and Peyton Manning, as well as established performers such as Colin Kaepernick and Richard Sherman.
ESPN's Darren Rovell reports that Manziel's top spot is the highest for any Browns player going into a season, with only quarterback Brady Quinn coming closer at No. 2 before the 2007 season.
Perhaps the greatest irony in the Manziel sales is that the Browns are in the process of redesigning their uniforms, which team president Alec Scheiner said would be "cutting-edge," for next season.
Should Manziel perform well in his rookie season, he may very well hold the top spot again once the Browns release the new-look jerseys and ever-devoted fans rush to secure theirs.
Here are the NFL's top 10 in jersey sales so far in order:
1. Johnny Manziel (Browns) 2. Russell Wilson (Seahawks) 3. Colin Kaepernick (49ers) 4. Peyton Manning (Broncos) 5. Richard Sherman (Seahawks) 6. Michael Sam (Rams) 7. Tom Brady (Patriots) 8. Drew Brees (Saints) 9. Aaron Rodgers (Packers) 10. 12th Fan (Seahawks)