diff --git a/quic/core/quic_connection_stats.h b/quic/core/quic_connection_stats.h
index f4b747d..0aee970 100644
--- a/quic/core/quic_connection_stats.h
+++ b/quic/core/quic_connection_stats.h
@@ -139,6 +139,9 @@
 
   // Packet number of first decrypted packet.
   QuicPacketNumber first_decrypted_packet;
+
+  // Max consecutive retransmission timeout before making forward progress.
+  size_t max_consecutive_rto_with_forward_progress = 0;
 };
 
 }  // namespace quic
diff --git a/quic/core/quic_sent_packet_manager.cc b/quic/core/quic_sent_packet_manager.cc
index 7ccd82d..7d32176 100644
--- a/quic/core/quic_sent_packet_manager.cc
+++ b/quic/core/quic_sent_packet_manager.cc
@@ -403,6 +403,17 @@
         }
       }
     }
+    // Records the max consecutive RTO or PTO before forward progress has been
+    // made.
+    if (consecutive_rto_count_ >
+        stats_->max_consecutive_rto_with_forward_progress) {
+      stats_->max_consecutive_rto_with_forward_progress =
+          consecutive_rto_count_;
+    } else if (consecutive_pto_count_ >
+               stats_->max_consecutive_rto_with_forward_progress) {
+      stats_->max_consecutive_rto_with_forward_progress =
+          consecutive_pto_count_;
+    }
     // Reset all retransmit counters any time a new packet is acked.
     consecutive_rto_count_ = 0;
     consecutive_tlp_count_ = 0;
diff --git a/quic/core/quic_sent_packet_manager_test.cc b/quic/core/quic_sent_packet_manager_test.cc
index 7692c49..d479c68 100644
--- a/quic/core/quic_sent_packet_manager_test.cc
+++ b/quic/core/quic_sent_packet_manager_test.cc
@@ -942,6 +942,7 @@
   manager_.OnRetransmissionTimeout();
   EXPECT_EQ(2u, stats_.tlp_count);
   EXPECT_EQ(1u, stats_.rto_count);
+  EXPECT_EQ(0u, stats_.max_consecutive_rto_with_forward_progress);
   // There are 2 RTO retransmissions.
   EXPECT_EQ(104 * kDefaultLength, manager_.GetBytesInFlight());
   QuicPacketNumber largest_acked = QuicPacketNumber(103);
@@ -965,6 +966,7 @@
   // All packets before 103 should be lost.
   // Packet 104 is still in flight.
   EXPECT_EQ(1000u, manager_.GetBytesInFlight());
+  EXPECT_EQ(1u, stats_.max_consecutive_rto_with_forward_progress);
 }
 
 TEST_F(QuicSentPacketManagerTest, CryptoHandshakeTimeout) {
@@ -2732,6 +2734,7 @@
   manager_.OnRetransmissionTimeout();
   EXPECT_EQ(QuicTime::Delta::Zero(), manager_.TimeUntilSend(clock_.Now()));
   EXPECT_EQ(1u, stats_.pto_count);
+  EXPECT_EQ(0u, stats_.max_consecutive_rto_with_forward_progress);
 
   // Verify two probe packets get sent.
   EXPECT_CALL(notifier_, RetransmitFrames(_, _))
@@ -2765,6 +2768,7 @@
 
   // Verify PTO is correctly re-armed based on sent time of packet 4.
   EXPECT_EQ(sent_time + expected_pto_delay, manager_.GetRetransmissionTime());
+  EXPECT_EQ(1u, stats_.max_consecutive_rto_with_forward_progress);
 }
 
 TEST_F(QuicSentPacketManagerTest, SendOneProbePacket) {