diff --git a/cobalt/media/base/metrics_provider.cc b/cobalt/media/base/metrics_provider.cc
index b6b4d72a591..6184f0c4481 100644
--- a/cobalt/media/base/metrics_provider.cc
+++ b/cobalt/media/base/metrics_provider.cc
@@ -122,6 +122,20 @@ void MediaMetricsProvider::EndTrackingAction(MediaAction action) {
   tracked_actions_start_times_.erase(action);
 }
 
+void MediaMetricsProvider::EndTrackingAction(MediaAction action,
+                                             int number_of_samples) {
+  DCHECK(IsActionCurrentlyTracked(action));
+  base::AutoLock scoped_lock(mutex_);
+
+  auto duration = clock_->NowTicks() - tracked_actions_start_times_[action];
+  if (number_of_samples > 0) {
+    // Report latency UMA if it writes non-zero samples.
+    auto duration_per_sample = duration / number_of_samples;
+    ReportActionLatencyUMA(action, duration_per_sample);
+  }
+  tracked_actions_start_times_.erase(action);
+}
+
 bool MediaMetricsProvider::IsActionCurrentlyTracked(MediaAction action) {
   base::AutoLock scoped_lock(mutex_);
   return tracked_actions_start_times_.find(action) !=
@@ -151,6 +165,18 @@ void MediaMetricsProvider::ReportActionLatencyUMA(
       UMA_HISTOGRAM_TIMES("Cobalt.Media.SbPlayer.Destroy.LatencyTiming",
                           action_duration);
       break;
+    case MediaAction::SBPLAYER_WRITE_SAMPLES_AUDIO:
+      UMA_HISTOGRAM_CUSTOM_MICROSECONDS_TIMES(
+          "Cobalt.Media.SbPlayer.WriteSamples.Audio.LatencyTiming",
+          action_duration, base::TimeDelta::FromMicroseconds(1),
+          base::TimeDelta::FromMilliseconds(100), 50);
+      break;
+    case MediaAction::SBPLAYER_WRITE_SAMPLES_VIDEO:
+      UMA_HISTOGRAM_CUSTOM_MICROSECONDS_TIMES(
+          "Cobalt.Media.SbPlayer.WriteSamples.Video.LatencyTiming",
+          action_duration, base::TimeDelta::FromMicroseconds(1),
+          base::TimeDelta::FromMilliseconds(100), 50);
+      break;
     case MediaAction::SBDRM_DESTROY:
       UMA_HISTOGRAM_CUSTOM_MICROSECONDS_TIMES(
           "Cobalt.Media.SbDrm.Destroy.LatencyTiming", action_duration,
diff --git a/cobalt/media/base/metrics_provider.h b/cobalt/media/base/metrics_provider.h
index 56a5c8328f0..2bf2f5a2b35 100644
--- a/cobalt/media/base/metrics_provider.h
+++ b/cobalt/media/base/metrics_provider.h
@@ -44,6 +44,8 @@ enum class MediaAction : uint8_t {
   SBPLAYER_CREATE,
   SBPLAYER_CREATE_URL_PLAYER,
   SBPLAYER_DESTROY,
+  SBPLAYER_WRITE_SAMPLES_AUDIO,
+  SBPLAYER_WRITE_SAMPLES_VIDEO,
   SBDRM_DESTROY,
   SBDRM_GENERATE_SESSION_UPDATE_REQUEST,
   SBDRM_UPDATE_SESSION,
@@ -87,6 +89,7 @@ class MediaMetricsProvider {
   // Used to record the latency of an action in the WebMediaPlayer.
   void StartTrackingAction(MediaAction action);
   void EndTrackingAction(MediaAction action);
+  void EndTrackingAction(MediaAction action, int number_of_samples);
   bool IsActionCurrentlyTracked(MediaAction action);
 
   void Reset();
diff --git a/cobalt/media/base/metrics_provider_test.cc b/cobalt/media/base/metrics_provider_test.cc
index 46a5470605f..78f043bf0b6 100644
--- a/cobalt/media/base/metrics_provider_test.cc
+++ b/cobalt/media/base/metrics_provider_test.cc
@@ -94,6 +94,28 @@ TEST_F(MediaMetricsProviderTest, SbPlayerDestroy) {
       std::string(kUmaPrefix) + "SbPlayer.Destroy.LatencyTiming", 100, 1);
 }
 
+TEST_F(MediaMetricsProviderTest, SbPlayerWriteSamplesAudio) {
+  metrics_.StartTrackingAction(MediaAction::SBPLAYER_WRITE_SAMPLES_AUDIO);
+
+  clock_.Advance(base::TimeDelta::FromMicroseconds(570));
+  metrics_.EndTrackingAction(MediaAction::SBPLAYER_WRITE_SAMPLES_AUDIO);
+
+  histogram_tester_.ExpectUniqueSample(
+      std::string(kUmaPrefix) + "SbPlayer.WriteSamples.Audio.LatencyTiming",
+      570, 1);
+}
+
+TEST_F(MediaMetricsProviderTest, SbPlayerWriteSamplesVideoAudio) {
+  metrics_.StartTrackingAction(MediaAction::SBPLAYER_WRITE_SAMPLES_VIDEO);
+
+  clock_.Advance(base::TimeDelta::FromMicroseconds(570));
+  metrics_.EndTrackingAction(MediaAction::SBPLAYER_WRITE_SAMPLES_VIDEO);
+
+  histogram_tester_.ExpectUniqueSample(
+      std::string(kUmaPrefix) + "SbPlayer.WriteSamples.Video.LatencyTiming",
+      570, 1);
+}
+
 TEST_F(MediaMetricsProviderTest, SbDrmCloseSession) {
   metrics_.StartTrackingAction(MediaAction::SBDRM_CLOSE_SESSION);
 
diff --git a/cobalt/media/base/sbplayer_interface.cc b/cobalt/media/base/sbplayer_interface.cc
index ec7b76d1acc..c854e1b241b 100644
--- a/cobalt/media/base/sbplayer_interface.cc
+++ b/cobalt/media/base/sbplayer_interface.cc
@@ -106,6 +106,10 @@ void DefaultSbPlayerInterface::WriteSamples(
     SbPlayer player, SbMediaType sample_type,
     const SbPlayerSampleInfo* sample_infos, int number_of_sample_infos) {
   DCHECK(!IsEnhancedAudioExtensionEnabled());
+  auto media_action = (sample_type == kSbMediaTypeAudio)
+                          ? MediaAction::SBPLAYER_WRITE_SAMPLES_AUDIO
+                          : MediaAction::SBPLAYER_WRITE_SAMPLES_VIDEO;
+  media_metrics_provider_.StartTrackingAction(media_action);
 #if SB_API_VERSION >= 15
   SbPlayerWriteSamples(player, sample_type, sample_infos,
                        number_of_sample_infos);
@@ -113,6 +117,8 @@ void DefaultSbPlayerInterface::WriteSamples(
   SbPlayerWriteSample2(player, sample_type, sample_infos,
                        number_of_sample_infos);
 #endif  // SB_API_VERSION >= 15
+  media_metrics_provider_.EndTrackingAction(media_action,
+                                            number_of_sample_infos);
 }
 
 void DefaultSbPlayerInterface::WriteSamples(
diff --git a/tools/metrics/histograms/metadata/cobalt/histograms.xml b/tools/metrics/histograms/metadata/cobalt/histograms.xml
index 1cc9ae95c45..5a6319ad3ed 100644
--- a/tools/metrics/histograms/metadata/cobalt/histograms.xml
+++ b/tools/metrics/histograms/metadata/cobalt/histograms.xml
@@ -338,6 +338,24 @@ Always run the pretty print utility on this file after editing:
   <summary>Timing data for the destruction of SbPlayer.</summary>
 </histogram>
 
+<histogram name="Cobalt.Media.SbPlayer.WriteSamples.Audio.LatencyTiming"
+    units="microseconds" expires_after="never">
+<!-- expires-never: Needed for long-term tracking of SbPlayer latencies. -->
+
+  <owner>borongchen@google.com</owner>
+  <owner>cobalt-team@google.com</owner>
+  <summary>Timing data for writing single audio sample.</summary>
+</histogram>
+
+<histogram name="Cobalt.Media.SbPlayer.WriteSamples.Video.LatencyTiming"
+    units="microseconds" expires_after="never">
+<!-- expires-never: Needed for long-term tracking of SbPlayer latencies. -->
+
+  <owner>borongchen@google.com</owner>
+  <owner>cobalt-team@google.com</owner>
+  <summary>Timing data for writing single video sample.</summary>
+</histogram>
+
 <histogram name="Cobalt.Media.SDR.Matrix" enum="MatrixID" expires_after="never">
 <!-- expires-never: Needed for baseline Media pipeline health metric. -->