diff --git a/src/core/lib/event_engine/posix_engine/timer.cc b/src/core/lib/event_engine/posix_engine/timer.cc
index 6f152ce494a375..cb57e1e75d8c3d 100644
--- a/src/core/lib/event_engine/posix_engine/timer.cc
+++ b/src/core/lib/event_engine/posix_engine/timer.cc
@@ -298,12 +298,10 @@ TimerList::TimerCheck(grpc_core::Timestamp* next) {
     return std::vector<experimental::EventEngine::Closure*>();
   }
 
-  if (!checker_mu_.TryLock()) return absl::nullopt;
-  std::vector<experimental::EventEngine::Closure*> run =
-      FindExpiredTimers(now, next);
-  checker_mu_.Unlock();
-
-  return std::move(run);
+  {
+    absl::MutexLock lock(&checker_mu_);
+    return FindExpiredTimers(now, next);
+  }
 }
 
 }  // namespace experimental
diff --git a/src/core/lib/event_engine/posix_engine/timer.h b/src/core/lib/event_engine/posix_engine/timer.h
index 30e4bb2eb6c0f8..e3164858507811 100644
--- a/src/core/lib/event_engine/posix_engine/timer.h
+++ b/src/core/lib/event_engine/posix_engine/timer.h
@@ -149,8 +149,8 @@ class TimerList {
   grpc_core::Mutex mu_;
   // The deadline of the next timer due across all timer shards
   std::atomic<uint64_t> min_timer_;
-  // Allow only one FindExpiredTimers at once (used as a TryLock, protects no
-  // fields but ensures limits on concurrency)
+  // Allow only one FindExpiredTimers at once (protects no fields but ensures
+  // limits on concurrency)
   grpc_core::Mutex checker_mu_;
   // Array of timer shards. Whenever a timer (Timer *) is added, its address
   // is hashed to select the timer shard to add the timer to
diff --git a/third_party/benchmark b/third_party/benchmark
index 344117638c8ff7..7f0e99af540a33 160000
--- a/third_party/benchmark
+++ b/third_party/benchmark
@@ -1 +1 @@
-Subproject commit 344117638c8ff7e239044fd0fa7085839fc03021
+Subproject commit 7f0e99af540a333108b92d792923ec7fc9e9fad9
diff --git a/third_party/bloaty b/third_party/bloaty
index 60209eb1ccc34d..34f4a66559ad49 160000
--- a/third_party/bloaty
+++ b/third_party/bloaty
@@ -1 +1 @@
-Subproject commit 60209eb1ccc34d5deefb002d1b7f37545204f7f2
+Subproject commit 34f4a66559ad4938c1e629e9b5f54630b2b4d7b0
diff --git a/third_party/boringssl-with-bazel b/third_party/boringssl-with-bazel
index b8a2bffc598f23..c1d9ac02514a13 160000
--- a/third_party/boringssl-with-bazel
+++ b/third_party/boringssl-with-bazel
@@ -1 +1 @@
-Subproject commit b8a2bffc598f230484ff48a247526a9820facfc2
+Subproject commit c1d9ac02514a138129872a036e3f8a1074dcb8bd
diff --git a/third_party/cares/cares b/third_party/cares/cares
index 6360e96b5cf8e5..91fa52c41ed44f 160000
--- a/third_party/cares/cares
+++ b/third_party/cares/cares
@@ -1 +1 @@
-Subproject commit 6360e96b5cf8e5980c887ce58ef727e53d77243a
+Subproject commit 91fa52c41ed44f6bd0b54d7aca1ae48c1d422f5b
diff --git a/third_party/envoy-api b/third_party/envoy-api
index 78f198cf96ecdc..bf59f2d652ca95 160000
--- a/third_party/envoy-api
+++ b/third_party/envoy-api
@@ -1 +1 @@
-Subproject commit 78f198cf96ecdc7120ef640406770aa01af775c4
+Subproject commit bf59f2d652ca9558fc4dcce6fc60b169f7fc02c7
diff --git a/third_party/googleapis b/third_party/googleapis
index 2f9af297c84c55..21c839628513a6 160000
--- a/third_party/googleapis
+++ b/third_party/googleapis
@@ -1 +1 @@
-Subproject commit 2f9af297c84c55c8b871ba4495e01ade42476c92
+Subproject commit 21c839628513a6b8d6ce99ae6911d4d2094c0767
diff --git a/third_party/googletest b/third_party/googletest
index 2dd1c131950043..a7f443b80b105f 160000
--- a/third_party/googletest
+++ b/third_party/googletest
@@ -1 +1 @@
-Subproject commit 2dd1c131950043a8ad5ab0d2dda0e0970596586a
+Subproject commit a7f443b80b105f940225332ed3c31f2790092f47
diff --git a/third_party/opencensus-proto b/third_party/opencensus-proto
index 4aa53e15cbf1a4..1664cc961550be 160000
--- a/third_party/opencensus-proto
+++ b/third_party/opencensus-proto
@@ -1 +1 @@
-Subproject commit 4aa53e15cbf1a47bc9087e6cfdca214c1eea4e89
+Subproject commit 1664cc961550be8f3058ddd29390350242f44f1f
diff --git a/third_party/opentelemetry b/third_party/opentelemetry
index 60fa8754d890b5..bd7cf55b6d45f3 160000
--- a/third_party/opentelemetry
+++ b/third_party/opentelemetry
@@ -1 +1 @@
-Subproject commit 60fa8754d890b5c55949a8c68dcfd7ab5c2395df
+Subproject commit bd7cf55b6d45f3c587d2131b68a7e5a501bdb10c
diff --git a/third_party/opentelemetry-cpp b/third_party/opentelemetry-cpp
index 4bd64c9a336fd4..cb9cd1d1d13a5c 160000
--- a/third_party/opentelemetry-cpp
+++ b/third_party/opentelemetry-cpp
@@ -1 +1 @@
-Subproject commit 4bd64c9a336fd438d6c4c9dad2e6b61b0585311f
+Subproject commit cb9cd1d1d13a5c6b6a99287dcb8b0d7bb62f277e
diff --git a/third_party/protobuf b/third_party/protobuf
index 2434ef2adf0c74..f3c140f96c9a7c 160000
--- a/third_party/protobuf
+++ b/third_party/protobuf
@@ -1 +1 @@
-Subproject commit 2434ef2adf0c74149b9d547ac5fb545a1ff8b6b5
+Subproject commit f3c140f96c9a7cb59f02289261c70c91bb9c009f
diff --git a/third_party/protoc-gen-validate b/third_party/protoc-gen-validate
index fab737efbb4b4d..ca115cfd131364 160000
--- a/third_party/protoc-gen-validate
+++ b/third_party/protoc-gen-validate
@@ -1 +1 @@
-Subproject commit fab737efbb4b4d03e7c771393708f75594b121e4
+Subproject commit ca115cfd131364a094044faab592858151fd291c
diff --git a/third_party/re2 b/third_party/re2
index 0c5616df9c0aaa..b91097e3989a8c 160000
--- a/third_party/re2
+++ b/third_party/re2
@@ -1 +1 @@
-Subproject commit 0c5616df9c0aaa44c9440d87422012423d91c7d1
+Subproject commit b91097e3989a8c8b463c0b6d7ffe96dafa5d6fad
diff --git a/third_party/xds b/third_party/xds
index 3a472e524827f7..555b57ec207be8 160000
--- a/third_party/xds
+++ b/third_party/xds
@@ -1 +1 @@
-Subproject commit 3a472e524827f72d1ad621c4983dd5af54c46776
+Subproject commit 555b57ec207be86f811fb0c04752db6f85e3d7e2
diff --git a/third_party/zlib b/third_party/zlib
index 09155eaa2f9270..0f51fb4933fc9c 160000
--- a/third_party/zlib
+++ b/third_party/zlib
@@ -1 +1 @@
-Subproject commit 09155eaa2f9270dc4ed1fa13e2b4b2613e6e4851
+Subproject commit 0f51fb4933fc9ce18199cb2554dacea8033e7fd3