LOS ANGELES -- Leaping, in two years, from a man among boys in high school to a boy among men in a Major League clubhouse left Clayton Kershaw just wanting to be one of the guys.

"I felt I had to prove myself to my peers, and I felt I didn't accomplish that last year," said Kershaw, who turned 21 this spring. "Last year I was this 20-year-old kid in the clubhouse and I didn't want to be looked down on as some youngster who didn't belong. This year I came in with a little chip on my shoulder."

Pulse
Dodgers at a glance
2009 record: 95-67
2008 record: 84-78
NL West champs
NL best record
NLCS matchup:
Phillies at Dodgers
Postseason tix: Buy now

WHO ARE THESE GUYS?
Loney: Taking good swings
Kuo: Long road back
Thome: Back in Philly
Loney: Building resume
Bullpen: Led by Broxton
Torre: Rep precedes him
Blake: Chemistry guy
Kershaw: Game 1 nod?
Dodgers: Eyes on prize
Kemp: Path of the pros
Furcal: Back healthy
Kershaw: Like Koufax
Hudson: Keeping head up
Billingsley: Unknown role
Ethier: Slump over
Torre: Tough decisions
Kershaw: Elite comparisons
Kemp: Nearly elite
Kershaw: Path to the pros
Billingsley: Fate in balance
Ethier: Aims to improve
Torre: Back to playoffs
Kershaw: Ready to rock
Rotation: Plenty of options
Kemp: Chasing LA history
Bullpen: Dominant pair
Honeycutt: Pitching guru
Kemp: Tools to match talent
Ethier: Walk-off wonder
Billingsley: Vying for spot
Ethier/Kemp: Dynamic duo
Torre: Another pennant race
Pierre: Receives high praise
Kershaw: Beyond his years

It's a funny choice of words for someone currently on the disabled list with a separated right shoulder, an injury sustained in a careless collision while shagging fly balls in batting practice, sending the gifted left-hander to the sidelines for two weeks in the middle of a pennant race.

But Kershaw credits that chip on his shoulder with helping him fit in. He knows what the driver's license says, but he doesn't consider himself a 21-year-old once he walks into the clubhouse, nor does he expect to be cut any slack for his birth date.

"I don't buy that I'm doing good 'for a 21-year-old,' " he said. "I don't think anybody here looks at me like I'm 21 or expects me to struggle because of my age. They expect me to pitch effectively in the big leagues. That's my job. I'm up here like everybody else and should be held to the same standards. I don't want to act my age, I just want to be part of the team."

Hold Kershaw to any standards you like, and he measures up nicely this year. He was erratic early -- allowing at least four earned runs in four of his first seven starts -- and conceded he was worried he might be returned to the Minor Leagues.

"So I took a step back a little, because I was thinking too much about saving my spot on the team and making sure I stayed up and put it in perspective," he said. "[Manager] Joe [Torre] showed confidence in me, and I figured stuff out. I shifted from an approach of having to prove myself to just going out every start and competing."

Blue chip
Clayton Kershaw's stats over his first two seasons.
Year
W-L
ERA
IP
BB
K
Opp. Avg.
20085-54.26107.252100.265
20098-82.8915986167.202*
* Lowest in the Major Leagues

He's allowed four earned runs only once in his past 21 starts. When the Dodgers were scoring in June and July, he reeled off five consecutive wins. He's been victimized more than any other Dodgers starter during the offense's second-half outage, going winless over his past nine starts (8-8 on the season), even though his ERA in that time actually lowered, from 2.95 to 2.89, ninth in the league.

"I always expect to win every time out, but it just started happening," he said. "You get on a run, you pitch on the right day when we're scoring runs. But the wins and losses come and go."

His opponents' batting average of .202 is lowest in the Major Leagues, and his strikeout-per-nine-innings ratio is fourth in the league. Basically a bystander in last year's postseason (two innings of relief), he'll be starting as long as he's healthy and the Dodgers are alive in October.

The occasional fits of wildness (he's second in the league in walks allowed) remain his last major hurdle, but they also come with being an inexperienced left-hander with a fastball in the mid-90s and an over-the-top curve that buckles knees when he commands it.

"I think I've earned the respect of my teammates this year," he said. "I feel like a member of the team. That's why being hurt has been so hard for me. I don't feel like I'm part of the team now. I'm never shagging again."