
The Royals had high hopes for Carter Jensen after he raked in a September callup late in 2025. He has not disappointed, tying Bob Hamelin for the club record for most home runs by a Royals rookie with 24. While he still has two weeks to surpass “The Hammer,” he has already cemented his status as one of the best rookie hitters in Royals history. But how does he stack up against the best rookie seasons the franchise has ever seen?
For this ranking, I’m looking at what each player actually accomplished as a rookie, with performance taking precedence over what he went on to do in his career. George Brett was a Hall of Famer, but his rookie season pales in comparison to a rookie slugger like Hamelin. Here are the top hitting rookie seasons in Royals history.
10. Bobby Witt Jr., 2022
There was a lot of hype for Bobby after a monster minor league season in 2021. He had the game-winning hit on Opening Day and became just the second player in MLB history with a 20-home-run/30-stolen-base season in his debut year. However, he put up just a .294 on-base percentage and showed some shaky defense at shortstop, which hurt his WAR numbers. It was a solid season, but there were blemishes to his game that he would quickly correct to become one of the best players in baseball.
9. Mike Fiore, 1969
Fiore had a very overlooked season in that inaugural Royals campaign. Selected from the Orioles in the expansion draft, he was a semi-regular at first base who finished second on the team with a .274 batting average. He also had a very patient eye, finishing 13th in the American League in walks, despite only making 427 plate appearances. It is still the 11th-most walks by a Royals hitter in a season. Fiore hit .274/.420/.428 with 12 home runs, but the next year he clashed with new manager Charlie Metro, and was traded to Boston, where he was buried on the depth chart.
8. Eric Hosmer, 2011
Hosmer also had a highly anticipated debut, and he quickly showed why the Royals had been so high on him. Called up in May, the 21-year-old hit .293/.334/.465 with 19 home runs and 78 RBI in 128 games. He looked smooth scooping out throws at first base, showing the defense that would win him four Gold Glove Awards. He would finish third in Rookie of the Year voting that year, eventually earning All-Star honors and a championship in Kansas City.
7. Lou Piniella, 1969
“Lou Piniella has the red ass,” wrote Seattle Pilots pitcher Jim Bouton in his book Ball Four. The two had been teammates in spring training for the expansion franchise, but Piniella’s fiery temper got him shipped to the Royals before the regular season began. It was a trade Seattle would regret. Piniella had the first hit in Royals history and batted .282/.325/.416 with 11 home runs, earning MVP votes and winning American League Rookie of the Year.
6. Mike Avilés, 2008
Avilés had to overcome a lot to make the big leagues. Drafted as a senior out of tiny Concordia College in New York, he was offered a cheap “take it or leave it” $1,000 bonus. He made the big leagues at age 27 and impressed early on. In just his tenth game, he had a four-hit day with two doubles and a home run. He ended the year with a line of .325/.354/.480, a batting average that would have been sixth in the league had he qualified. He finished fourth in Rookie of the Year voting, but his 4.7 rWAR was just behind winner Evan Longoria’s 4.8.
5. Angel Berroa, 2003
The Angel Berroa era in Kansas City ended poorly, but the future seemed bright in his rookie year. Acquired from the Athletics in the Johnny Damon trade, the Royals hoped Berroa could solidify a shortstop position that had been inconsistent since the days of Freddie Patek. He was a big part of why the team had a successful 2003 season, hitting .287/.338/.451 with 17 home runs, 73 RBI and 21 stolen bases. He edged out Hideki Matsui to win American League Rookie of the Year honors, but he never lived up to a long-term deal he signed with the club.
4. Bob Hamelin, 1994
Hamelin was 26 years old when he burst onto the scene in 1994. He didn’t look like a baseball star – he was chubby and wore glasses – but that was part of what endeared him to Royals fans that summer. Oh and the dingers. So many dingers. Hamelin smashed 24 home runs in just 375 plate appearances, finishing ninth in the American League. His bat helped propel the Royals during a hot streak where they won 14 in a row to climb into contention – he hit .354 with six home runs in those games. He finished fifth in the league in OPS and won Rookie of the Year, but just five years later he would retire from baseball.
3. Carter Jensen, 2026
Last night, Jensen set the Royals rookie record for most extra-base hits with 58, and he has flashed some promising power all season. The Kansas City native is hitting .232/.319/.452 with 62 walks and his 24 home runs are fourth-most among all rookies. He has had some mixed results behind the plate, but has shown a strong arm. He has gunned out 35 percent of attempted base stealers, fifth-highest for anyone with at least 10 caught stealing. The Royals are used to a power-hitter behind the plate, and Jensen is a worthy successor to Salvador Perez.
2. Carlos Beltrán, 1999
Beltrán got his Hall of Fame career off to a good start by making an immediate impact for the Royals in his rookie year. He exhibited a unique blend of power and speed, smashing 22 home runs and stealing 27 bases. He became just the eighth rookie to score 100 runs and hit 100 RBI. Overall, he hit .293/.337/.454 while playing spectacular defense in center. He was worth 4.7 rWAR and was a near-unanimous choice for Rookie of the Year.
1. Kevin Seitzer, 1987
All Kevin Seitzer did was hit. He got off to a blazing start, batting .382 in the month of April. He was named to the All-Star Game at third that summer and caught fire in August, batting .395 and tying a club record with a six-hit game against Boston. He led the league with 207 hits, at the time, the fifth-most by a rookie since 1900. He was a 5.5 rWAR player, hitting .323/.399/.470 with 15 home runs and 80 walks. But he did this in a home-run-happy year – the 1987 season saw a spike in power and slugger Mark McGwire and his 49 homers beat out Seitzer for Rookie of the Year.
Honorable mention: Pat Kelly, 1969; Bo Jackson, 1987; Jon Nunnally, 1995; David DeJesus, 2004; Alex Gordon, 2007.












