diff --git a/src/components/TeamPitchingTable.vue b/src/components/TeamPitchingTable.vue
index 26271bb..a7fdb5c 100644
--- a/src/components/TeamPitchingTable.vue
+++ b/src/components/TeamPitchingTable.vue
@@ -28,6 +28,7 @@
               <th>WP</th>
               <th>IR</th>
               <th>IRS</th>
+              <th>IRS%</th>
               <th>WHIP</th>
               <th>H/9</th>
               <th>HR/9</th>
@@ -67,6 +68,7 @@
               <td>{{ stat.wp }}</td>
               <td>{{ stat.ir }}</td>
               <td>{{ stat.ir_sc }}</td>
+              <td>{{ formatIRSPercentage(stat) }}</td>
               <td>{{ stat.whip.toFixed(2) }}</td>
               <td>{{ hitsPer9(stat) }}</td>
               <td>{{ hrsPer9(stat) }}</td>
@@ -99,6 +101,7 @@
               <th>{{ totalPitchingStat.wp }}</th>
               <th>{{ totalPitchingStat.ir }}</th>
               <th>{{ totalPitchingStat.ir_sc }}</th>
+              <th>{{ formatIRSPercentage(totalPitchingStat) }}</th>
               <th>{{ totalPitchingStat.whip.toFixed(2) }}</th>
               <th>{{ hitsPer9(totalPitchingStat) }}</th>
               <th>{{ hrsPer9(totalPitchingStat) }}</th>
@@ -163,6 +166,11 @@ export default {
     },
     hrsPer9(stat: PitchingStat): string {
       return hrsPer9(stat)
+    },
+    formatIRSPercentage(stat: PitchingStat): string {
+      if (stat.ir === 0) return '-'
+
+      return `${(stat.ir_sc_pct * 100).toFixed(1)}%`
     }
   }
 }
diff --git a/src/services/pitchingStatsService.ts b/src/services/pitchingStatsService.ts
index 83b5963..9ab0f79 100644
--- a/src/services/pitchingStatsService.ts
+++ b/src/services/pitchingStatsService.ts
@@ -22,6 +22,7 @@ export interface PitchingStat {
   bsave: number
   ir: number
   ir_sc: number
+  ir_sc_pct: number
   ab: number
   run: number
   e_run: number
@@ -273,6 +274,7 @@ export function aggregatePitchingStats(pitchingStats: PitchingStat[]): PitchingS
     bsave: 0,
     ir: 0,
     ir_sc: 0,
+    ir_sc_pct: 0,
     ab: 0,
     run: 0,
     e_run: 0,
@@ -350,6 +352,7 @@ export function aggregatePitchingStats(pitchingStats: PitchingStat[]): PitchingS
 
   return {
     ...totalStat,
+    ir_sc_pct: irsPercentage(totalStat),
     era: eraFromOuts(totalStat),
     whip: whipFromOuts(totalStat),
     kPer9: kPer9FromOuts(totalStat),
@@ -397,6 +400,7 @@ function makeModernPitchingStatFromLegacy(legacyStat: LegacyPitchingStat): Pitch
     kPer9: kPer9(legacyStat),
     bbPer9: bbPer9(legacyStat),
     kPerBB: kPerBB(legacyStat),
+    ir_sc_pct: irsPercentage({ ir: legacyStat.ir, ir_sc: legacyStat.irs }),
 
     // no easy way to get below values from legacy stats afaik
     tbf: 0,
@@ -438,6 +442,7 @@ function normalizePitchingStat(rawStat: PitchingStatRaw): PitchingStat {
     bsave: rawStat.bsave,
     ir: rawStat.ir,
     ir_sc: rawStat.ir_sc,
+    ir_sc_pct: irsPercentage(rawStat),
     ab: rawStat.ab,
     run: rawStat.run,
     e_run: rawStat.e_run,
@@ -528,3 +533,7 @@ function kPerBB(stat: { so: number, bb: number }): number {
   return stat.so / stat.bb
 }
 
+function irsPercentage(stat: { ir: number, ir_sc: number }): number {
+  return stat.ir === 0 ? 0 : stat.ir_sc / stat.ir
+}
+