diff --git a/cmd/leagueabbr.go b/cmd/leagueabbr.go
index fe0549c..974a0b6 100644
--- a/cmd/leagueabbr.go
+++ b/cmd/leagueabbr.go
@@ -19,6 +19,7 @@ import (
 	"strings"
 )
 
+// retrieved from https://statsapi.mlb.com/api/v1/leagues
 var leagueIDs = map[string]int32{
 	"al":  103,
 	"nl":  104,
diff --git a/cmd/sportabbr.go b/cmd/sportabbr.go
index 80e2ffb..8275abb 100644
--- a/cmd/sportabbr.go
+++ b/cmd/sportabbr.go
@@ -19,6 +19,7 @@ import (
 	"strings"
 )
 
+// retrieved from https://statsapi.mlb.com/api/v1/sports
 var sportIDs = map[string]int32{
 	"mlb":        1,
 	"aaa":        11,
diff --git a/cmd/teamabbr.go b/cmd/teamabbr.go
index df9a142..f604eb2 100644
--- a/cmd/teamabbr.go
+++ b/cmd/teamabbr.go
@@ -19,6 +19,7 @@ import (
 	"strings"
 )
 
+// retrieved from https://statsapi.mlb.com/api/v1/teams
 var teamIDs = map[string]int32{
 	"laa": 108,
 	"az":  109,