SCOTTSDALE, Ariz. -- Rockies right-hander Antonio Senzatela has shown this spring that while he respects hitters he has seen mostly on television, he believes he is good enough to beat them.

In his second straight stellar Spring Training performance, Senzatela, a candidate for a season-opening rotation spot, started and held the Royals scoreless for 4 1/3 innings, with four strikeouts, in the Rockies' 4-2 loss Monday afternoon.

Never mind that Senzatela is just 22, with his highest experience level being seven Double-A starts during an abbreviated 2016 campaign.

"That's funny, because you're watching the games and saying, 'Man, that guy's pretty good,'" Senzatela said. "But when you face him, you say, 'OK. I need to get him out. It's my job.'"

In his last outing, Senzatela struck out four in three innings against the Rangers. Against the Royals, he was so efficient that manager Bud Black let him face two batters in the fifth. It's the deepest a Rockies pitcher has gone this spring.

4.1 innings pitched. 3 hits. 0 runs. 4 strikeouts. Antonio was senzational today! pic.twitter.com/ToQAuyKSs7 — Colorado Rockies (@Rockies) March 13, 2017

Senzatela earned the Class A California League Pitcher of the Year award in 2015 after posting a 9-9 record, 2.51 ERA and 143 K's in 154 innings at Modesto. Last year, he was stellar when available at Double-A Hartford: 4-1 record and a 1.82 ERA in seven starts. But he was twice placed on the disabled list as the Rockies handled his right shoulder soreness with extreme caution, and he was given time to go home to Venezuela to be with his mother, who battled stomach cancer before her death.

The Rockies haven't had a pitcher skip Triple-A since righty Eddie Butler in 2014. Butler struggled on and off for Colorado, and was traded to the Cubs this offseason. With two first-round picks in lefty Kyle Freeland and righty Jeff Hoffman , along with righty German Marquez , competing for a rotation spot -- Marquez and Hoffman debuted in the Majors last year -- the Rockies are still trying to determine where Senzatela fits in.

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Black is watching everything about the young righty, noting Monday that the Royals took "funny swings" on his fastball and that Senzatela mixed in his slider and changeup effectively. Black was also complimentary of Senzatela's mound presence.

"Everybody's talked about his ability to move pitches around the strike zone," Black said. "When you can do that, you can have a lot of success. And he's got a delivery that he repeats and confidence in the pitches he's going to throw the most, and that starts with his fastball."