We'll see some deals in August and the trading process becomes a whole lot easier if players clear waivers (here's the full explanation). We'll keep a constantly-updated list of the players to clear waivers right here as the month progresses. We won't hear of all players who clear waivers, so there could be surprise trades, but as soon as we know a player clears waivers, we'll add him to the list.
Cardinals - Khalil Greene (source)
Nationals - Cristian Guzman (source)
Red Sox - John Smoltz (source)
Yankees - Brian Bruney, Robinson Cano, Mark Melancon, David Robertson (source)
D'Backs - Jon Garland (source)
Brewers - Mike Cameron, Jason Kendall, Craig Counsell, Braden Looper (source)