IL-10 / IL-15 / IL-60
Injured-list tiers — the minimum days a player must stay out.
What IL-10 / IL-15 / IL-60 means
Position players use the 10-day list and pitchers the 15-day; the 60-day list frees a 40-man roster spot and effectively ends a chunk of the season. The tier is the club's own read on severity, which makes it the most honest injury signal available.
Also written
il · il10 · il15 · il60 · injured_list · il_10 · il_15 · il_60
Source
MLB Stats API