Adam Dunn is usually one of the first players to come up when the three true outcomes are discussed, and his bounce back year on Chicago's South Side has him on pace for the most Adam Dunn-like (or Rob Deer-like) season in baseball history. 

Heading into last night's games, Dunn owned a .215/.362/.530 slash line and led the American League in walks, strikeouts, and home runs. In 312 plate appearances, Dunn had walked, struck out, or hit a home run 62.8 percent of the time, eclipsing the current single-season record set in 2007 by Jack Cust (58.2%).

Despite his reputation for being an all-or-nothing hitter with a great deal of patience, Dunn's highest single-season TTO% (53.0%) only ranks 18th of all-time. Mark McGwire (three) and Cust (two) command the top five positions on the list, and Mark Reynolds (54.7% in 2010) and Ryan Howard (54.5% in 2007) are the only active players with seasons that rank among the top 10.

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There needs to be a TTO metric that's totals-based in addition to the rate-based one. TTO% x PA would be one way, but that seems to me to undervalue the HR part.

Also, leading the league in BB, SO, and HR in the same season should obviously be the TTO Triple Crown. Has it ever been done before? McGwire, Cust, Reynolds, Howard, Deer never did it, according to a quick scan.
Fox posted a graphic on Saturday showing the only guys to ever do it were Ruth and Mantle. Nice company to be in.