Game 2 is Saturday afternoon.
Pinch-hitter Daniel Descalso singled with one out in the 13th off rookie Chris Withrow and Matt Carpenter walked. Jansen, usually the Dodgers' closer, relieved and Beltran won it with his hit on a 3-1 count.
Winning pitcher Lance Lynn strengthened his case for a possible Game 4 start with two scoreless innings. Withrow took the loss.
The Dodgers had two on in the ninth, 10th and 11th and came up empty. They stranded 11 overall while going 1 for 10 with runners in scoring position. They averaged 6 1/2 runs and batted .333, best ever in an NL postseason series, while taking a four-game division series from the Braves.
Neither team had much time to exhale before the next game, scheduled to start 14 1/2 hours after Descalso crossed the plate. It features a marquee pitching matchup major league ERA leader Clayton Kershaw vs. Cardinals rookie Michael Wacha, who's flirted with no-hitters his last two starts.
The Dodgers failed to capitalize on Zack Greinke's season-high 10 strikeouts in eight stingy innings because they couldn't knock out Joe Kelly.
All games televised by TBS
Friday • St. Louis 3, Los Angeles 2
Saturday • Los Angeles (Kershaw 16-9) at St. Louis (Wacha 4-1), 2:07 p.m.
Monday • St. Louis (Wainwright 19-9) at Los Angeles (Ryu 14-8), 6:07 p.m.
Tuesday • St. Louis at Los Angeles, 8:07 p.m.
x-Wednesday • St. Louis at Los Angeles, 2:07 p.m.
x-Oct. 18 • Los Angeles at St. Louis, 8:37 p.m.
x-Oct. 19 • Los Angeles at St. Louis, 8:37 p.m.