I have never heard this theory. Every team's 5th best hitter should be in the 3 hole? I doubt that there is a single team in MLB that has their 5th best hitter in the 3 hole.
Now, or throughout MLB history.
But Spockmaster knows more than EVERY other manager in MLB history....so it's ok.
Fuck man, google "how to make a lineup" or "how to make a baseball lineup" or " how to make a batting order" and see what you find.
Wiki -#3
The third batter, in the three-hole, is generally the best all-around hitter on the team, often hitting for a high batting average but not necessarily very fast. Part of his job is to reach base for the cleanup hitter, and part of it is to help drive in baserunners himself. Third-place hitters are best known for "keeping the inning alive". However in recent years, some managers have tended to put their best slugger in this position.
Typically the greatest hitters for a combination of power and OBP on their teams bat third, as is shown by the use of such hitters as Babe Ruth, Mel Ott, Ted Williams, Willie Mays, Barry Bonds, Mickey Mantle, Carl Yastrzemski, Albert Pujols, Joey Votto, Miguel Cabrera, Josh Hamilton, Evan Longoria, Jose Bautista, and Hank Aaron in this position in the lineup. Even without the combination of extreme power (Yogi Berra, Al Kaline, George Brett) or high batting average (Ernie Banks, Harmon Killebrew, Johnny Bench, Mike Schmidt, Reggie Jackson) this batting position contains an inordinate number of hitters who eventually become members of the Baseball Hall of Fame.
Bleacher Report -
The third hitter in the lineup should be the best hitter on the team. He should score runs, hit for a high average, hit for power, and be able to drive in runs. It's arguably the most important spot in the batting order.
Miguel Cabrera can do all of that with a bat in his hands, and as of 2011, he is arguably the best pure hitter in baseball.
It's COMMON KNOWLEDGE to bat your best hitter 3rd. This MORONIC notion of batting Avila 3rd is one of the worst idea's I've ever heard of, by anyone......EVER.