Free during beta —Free during beta — to track favorite players + get game alertsto track favorites + alerts
MLBPlayer profile/LAA
RP#56LAAAdvanced data
Ryan Zeferjahn
Relief pitcher
6' 5" · 209 lbs · 28 yo
Form Line · next game · as of Jul 30
1.7K▲ +0.1vs pace (1.6)
typical range (~68%) 1–3 · on 44 games
ER0.4-0.1
The One's forward projection vs the player's own season pace — not a grade, not accuracy-tested. What is Form Line?
Today · vs MIL
Milwaukee Brewers
MIL @ LAA
LAA's next →
Place a bet · player props
Bet Ryan's props.
Strikeouts, hits, total bases, run line — DraftKings and FanDuel ship every player prop on tonight's slate. Geo-fenced to the books legal in your state.
21+ · we may earn a referral fee · your odds unchanged.
Statcast fingerprint
Ryan Zeferjahn
MLB percentile · n=406
- xwOBA85
- xBA100
- xSLG98
- Barrel %78
- Hard-hit %66
- Exit velo43
- Whiff %97
- Chase %1
- K %96
- BB %4
Elite expected average (100th pct) — chase (1st pct) the soft spot.
Statcast · 2026 season
The advanced layer
Expected stats, sabermetric context, and rate metrics straight from the MLB Stats API. Each bar is calibrated against league benchmark ranges, not season percentiles — so the position is stable even on a small sample.
PITCHING
Run prevention
44 G · 0 GS · 50 IP
Run prevention
ERA3.78
5.502.50
FIP3.96
5.003.00
xFIP3.94
5.003.00
WHIP1.20
1.551.00
Stuff & control
K/912.8
6.012.0
BB/95.8
4.52.0
HR/90.90
1.600.70
K%32.7%
18.0%30.0%
BB%14.7%
11.0%5.0%
Quality of contact
BABIP—
.270.330
GO/AO0.93
0.801.60
Pitch mix
Arsenal
2026 · 892 pitches
PitchUseWhiffRV/100
- Sweeper38%41%+2.1
- 4-Seam Fastball32%42%+0.7
- Sinker16%12%-1.0
- Slider11%20%+0.1
RV/100 is pitcher-side — negative is a pitch that saved runs.
Keep exploring
Related players
Other RP around the league