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Kenley Jansen: Why Is He So Good?

Kenley Jansen: Why Is He So Good?

  • Kenley Geronimo Jansen
  • Pronunciation: KEHN-lee JAN-sin
  • Born: 9/30/1987 in Willemstad, Curacao
  • Debut: July 24, 2010
YearTeamLGNPPitch TypeAvg Pitch Speed (mph)Avg Perceived Speed (mph)Avg Spin Rate (rpm)Avg Extension (feet)Avg Exit Velocity (mph)
2016 Dodgers NL 363 Cutter 93.08 94.82 2507.00 7.17 86.35
MLB Avg - - - Cutter 88.27 87.94 2197.00 5.98 87.61
Pitch Summary
  • Threw fastballs 92-95mph (3% of all pitches)
  • cutter 91-94 (89%)
  • slider 81-83 (7%)
  • slider 81-83 (7%)
  • 397 total pitches (66% in the strike zone)
Last Game
  • slider 81-83 (4 pitches, 31% of total)
  • slider 81-83 (4 pitches, 31% of total))
  • Threw 13 total pitches (85% in the strike zone)
Last Game Summary
  • walks 0 hits. 2 strikeouts. Threw 2 first-pitches in the strike-zone of 3 total (66%). Faced 0 LHH 3 RHH.
Strengths
  • Kept first-pitch down 43% of the time (25% was avg)
  • Rarely made mistakes with his slider - 5 of 28 thrown (17% ; 17% is avg)
Weaknesses
  • Threw first-pitch up often 48% of the time (28% was avg)
Patterns
  • Liked to mix in cutters often - 89%. Threw first-pitch cutter much more often than most pitchers at 90%. Threw fewer first-pitch fastballs than most pitchers at 2%.
  • Threw strikes on 0-2 counts, throwing balls out of the zone only 30% of the time (43% is avg).
  • Threw strikes on 1-2 counts, throwing balls out of the zone only 28% of the time (33% is avg).
  • After giving up an extra-base hit off his Cut FB he threw it again 100% of the time (41% is avg).
Windup/Stretch
  • From the stretch, threw strikeFrom the stretch, located pitches 4" up. From the stretch, threw cutters 13% more frequently (97% vs 86% of all pitches).
Insights
  • Threw pitches inside the strikezone 67% compared to the 59% MLB average.
  • 0 Threw fastballs outside to LHH. His fastballs were on the faster side at 93. Kept sliders low to righties. Kept sliders low to lefties. Had a consistent slider angle at -9 deg. Long sweeping slider break length. Threw cutter high to LHH. His cutter was one of the fastest at 92.60.
  • Average control of cutter. Got good spin on cutters (41% above MLB avg).

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