PHOENIX – When Chris Heston took the mound for his first bullpen session this spring, he looked down to the plate and saw Buster Posey waiting to catch him.
General manager Brian Sabean stood behind a chain-link fence and manager Bruce Bochy and pitching coach Dave Righetti planted themselves alongside the right-hander, watching closely.
"You try to block stuff out, but it was impossible not to notice that," Heston said. "That guy down there that's catching you is the MVP."
Posey wasn't on hand during a "B" game at the Arizona Diamondbacks' facility Sunday, but Heston and fellow prospect Mike Kickham again drew an influential crowd, despite the early start time. Bochy and Righetti were on the bench for the game, and Sabean watched with a handful of his lieutenants.
The implication was clear: Heston and Kickham will be counted on, possibly sooner rather than later.
"You need depth in your rotation, and these are two guys we think a lot of," Bochy said. "If needed at some point, they'll be ready. Both of them, I thought, did a real nice job."
Heston threw three innings against Diamondbacks minor leaguers, giving up two hits and striking out four. Kickham struck out the side in his first inning before giving up a run on a sacrifice fly in his second inning.
Heston, a strike-throwing right-hander, and Kickham, a left-hander with electric stuff, couldn't be more different on the mound. But they're practically inseparable off it.
"It's not a rivalry," Kickham said. "But I do always try to keep up with him. We're two very different types, but you can emulate success."
There was plenty of that last season at Double-A Richmond. The 24-year-old prospects were twin terrors for the rest of the Eastern League. Heston had a 2.24 ERA and was the league's Pitcher of the Year, while Kickham joined his friend on the league's All-Star team after going 11-10 with a 3.05 ERA and a team-high 137 strikeouts in 150 2/3 innings.
Heston has a clean, repeatable delivery and relies on a variety of pitches, including a sinker that he learned from former Giants left-hander Steve Kline two seasons ago.
Posey was impressed when he caught Heston, saying he "clearly has a very good idea of what he wants to do with every pitch."
Heston has caught Matt Cain's eye, too.
"He's real easy" with his delivery, Cain said. "He looks pretty smooth."
Heston was pleased with Sunday's outing because he was able to keep the ball down and let the defense go to work. He got four ground-ball outs in his three innings, and one of the two hits was an infield single.
"I was happy for Chris," Bochy said. "That had to do a lot for his confidence."
Cain gave up four hits and a run in a 6-1 victory over the Milwaukee Brewers, but he left after the third inning because of an upset stomach.
"Something at dinner didn't agree with me," Cain said.