Live recovery modeling

MLB Injury Recovery Calculator

Model probabilistic return timelines for any player. Adjust injury grade, player profile, and missed time to see playoff availability, roster risk, and recovery scenarios — all computed locally in your browser.

Injury & Player Profile

Injury type Calf Strain Grade 2 Player age 31 Older players typically recover slower; age 30+ adds ~15% to median timeline Position group Outfielder Running-intensive positions (OF, SS, 2B, C) add recovery demand vs. DH/1B Prior same-site injuries 1 Each prior same-site injury adds ~10% to median recovery and increases re-injury risk Games already missed 0 Slide to the current date in the season; the timeline anchors from injury date Season date (injury occurred) Aug 15 Day 1 = Opening Day. Day 105 ≈ mid-August. Wild Card Series typically begins ~Day 180

Based on MLB injury surveillance data (2010–2024), peer-reviewed return-to-play studies, and position-specific demand modeling. Not medical advice.

Recovery Timeline

Moderate calf strain · Age 31 · OF

Set parameters and press Calculate to generate a recovery timeline.

How the model works

Injury grading & base timelines

Grade 1 = mild (microtears, <10% fiber disruption). Grade 2 = moderate (partial tear, 10–50%). Grade 3 = severe (complete tear or >50%). Base medians come from MLB HITS database (2010–2024) and peer-reviewed RTW meta-analyses (Connell 2021, Bayer 2018, Erickson 2019).

Age & position adjustments

Age ≥30 adds a multiplicative factor of 1.15× to median recovery (linear interpolation 18–42). Position groups: Pitchers (lower limb) +10%, Catchers +15%, Infielders +5%, Outfielders +10%, DH/1B baseline. Running demand drives the delta.

Prior injury compounding

Each prior same-site injury adds 10% to median and increases re-injury hazard ratio by ~1.3× (Orchard 2013, MLB epidemiological data). The model caps at 5 priors (1.5× median max).

Probability bands & distribution

Recovery time is modeled as a log-normal distribution (positive skew matches RTW data). The 68% band = median × [exp(-σ), exp(+σ)]; 95% band = median × [exp(-2σ), exp(+2σ)]. σ ≈ 0.35 for muscle strains.

Playoff availability calculation

Wild Card Series = Day 180–185. Division Series = Day 188–198. Availability = P(return ≤ series start). The model integrates the log-normal CDF. "Likely" ≥66%, "Possible" 33–66%, "Unlikely" <33%.

Limitations & disclaimer

This tool uses population-level averages. Individual anatomy, rehab quality, team medical staff, pain tolerance, and game leverage all shift outcomes. Always consult club medical staff for real decisions. Data sources: MLB HITS, PubMed RTW meta-analyses, Baseball Prospectus injury archives.