Shattenkirk conjured up two assists as St. Louis rallied from two goals down in the third period and beat the San Jose Sharks 4-3 in OT on Saturday.
Shattenkirk is tied for second on the club with 19 points.
Shattenkirk handed out two assists for the second straight game in the Blues' 4-3 shootout win over Nashville on Monday.
Shattenkirk also had two assists in a 6-0 season-opening win over Detroit on Saturday.
Shattenkirk had two assists in a 6-0 season-opening win over Detroit on Saturday.
Shattenkirk had nine goals and 34 assists in each of his first two NHL seasons.