It was time for the TBS analysts to change speeds.

After Game 1 of the NLCS, all the talk was about Blake Snell’s use of a dominant changeup.

Before Game 2 on the network’s pregame show, Hall of Fame pitcher Pedro Martinez and former all-star shortstop Jimmy Rollins were all over the different types of fastballs that Milwaukee Brewers starter Freddy Peralta and Los Angeles Dodgers stater Yoshinobu Yamamoto both throw against hitters to be dominant.

Peralta has a 9-1 record with a 1.77 ERA and a WHIP of 1.00 in 17 starts at home, so his fastball certainly plays well at American Family Field. Martinez explained that Peralta’s heat is hard for the hitter to recognize because of the movement on the ball.

“He’s so deceiving,” Martinez said. “He can vary where he throws his fastball. It’s hard enough to get by anybody. It’s hard for lefties to pick it up and it’s also really deceiving to righties because it jumps at them.”

And though ‘Fastball Freddy’ will lean on the location of his best pitch to get key outs, Martinez said he needs to mix it up against the talented Dodgers’ lineup.

“His fastball is really effective but he’s going to have to use his secondary stuff to go with it,” Martinez said.

Rollins explained why Peralta’s fastball can be so effective – he creates a tough angle for hitters by throwing the ball across his body down and away to righthanded batters and in to lefties. Rollins said his fastball has the same effect as Hall of Famer Mariano Rivera’s cutter.

“When he has his angle and he hits the pitch down and away, it creates the same cutter effect,” Rollins said. “When he runs it in on lefties they never have a chance. When Fastball Freddy is on it’s not just a fastball.”

When the conversation turned to Yamamoto, Martinez said the Brewers would have to lay off his nasty split-fingered fastball.

“Wipeout splitter,” Martinez said. “But he’s going to have to be in the strike zone with it. If I’m the Milwaukee Brewers I’m hunting fastballs in the strike zone and let go on the splitter because he’s going to try to put you away with the splitter.”

Rollins said the Brewers would probably have more success against Yamamoto in Game 2.

“He’s more of a conventional pitcher and I think that plays well for the Brewers bats,” Rollins said.

The Brewers had success against Yamamoto earlier this season when they tagged him for five runs in the first inning of a 9-1 victory at American Family Field in July. Peralta was the winning pitcher in that game.

This article originally appeared on Milwaukee Journal Sentinel: TBS analysts focus on fastballs in Peralta-Yamamoto pitching matchup