Kenley Jansen played 17 seasons (2010–2026) for LAD, ATL, BOS and 2 other clubs. Career regular-season line: a 58–46 record, 1,329 strikeouts and a 2.60 ERA. Mountain Arc career, peaking in 2017. Honors: 3× All-Star Selections.
Sport-specific career totals from the active profile tables, with VAL shown whenever the sport has a value file.
Career boards only, within MLB
Cross-sport prominence: 88.9th percentile among MLB careers — a within-sport percentile, because career value is not comparable across sports.
MLB Advanced — ERA+ & OPS+ LeadersMLB Age Milestones — Youngest to 1,000 Hits, 100 HR, 100 Wins and 1,000 KMLB Breakout Seasons — Biggest Career-High LeapsMLB Career Arc TypesMLB Career Dominance — top-25 in multiple all-time categoriesMLB Clutch Delta — Who Rises in OctoberMLB Compilers vs Comets — Career ShapeMLB Consistency Index — Mr. Reliable vs Boom-BustMLB Era-Adjusted Careers — Greatest Careers on One ScaleMLB Era-Adjusted Seasons — Greatest Seasons in Modern TermsMLB Franchise Mt. Rushmores — Four Faces of Every TeamMLB Greatest Single Seasons by VAL (Hitters and Pitchers)MLB Hall of Very Good — Great Careers on Cooperstown's DoorstepMLB JourneymenMLB League Leader Marks — Most League-Leading SeasonsMLB Loyalty
Players whose careers had the same shape — total value, peak, best three-season stretch, length and when the value came — measured with VAL against their own leagues.
Bio, rosters, and year-by-year/career stat splits come directly from MLB's own official public StatsAPI.
Fan Rating
Rate Kenley Jansen — All-Time
15 seasons · peak 5.7 in 2017
VAL (Value Above League) measures each MLB season against that season's league; the dashed line is zero — a season that added nothing above the league's fringe. ● peak · ○ league-best season.
15.8 career wins over 15 seasons · 1 win = 2.61 VAL
Best season · 2017 · +2.2 wins
2.2 of LAD's 104 wins (2%)
Latest season · 2026 · +0.4 wins
0.4 of DET's 76 wins (1%)
VAL 3.0 measures each part of a MLB player's game in his sport's own currency against what that season's fringe players produced, converted to team wins with rates fitted from every team-season in the encyclopedia. Team wins are the club's actual regular-season wins, counted from pitcher decisions, which can miss a few games; a traded season, or one whose club record is missing, shows no share.
How often Kenley Jansen led or placed top-ten on a MLB season board, and the shape of the career — computed from the same per-season boards the year pages publish, so every number is checkable.
Black ink
0
league-leading seasons · 10 top-ten finishes
Career arc
Mountain Arc
The classic build → peak → decline arc — rose to a dominant peak, then faded. Peak 2017, 15 rated seasons.
Season boards
10
top-ten finishes across the MLB season boards
Swipe sideways for the full stat line →
Wore 5 distinct franchise crests across 17 seasons (2010–2026) — a true nomad. The crest trail: