diff --git a/docs/tutorials/rllib/index.md b/docs/tutorials/rllib/index.md
index 0f9d47597..401c4040e 100644
--- a/docs/tutorials/rllib/index.md
+++ b/docs/tutorials/rllib/index.md
@@ -22,11 +22,11 @@ See the [documentation](https://docs.ray.io/en/latest/rllib/index.html) for more
 ## Examples using PettingZoo:
 
 ### Training:
+ * [supersuit preprocessing: pistonball](https://github.com/ray-project/ray/blob/master/rllib/examples/env/greyscale_env.py)
  * [simple multi-agent: rock-paper-scissors](https://github.com/ray-project/ray/blob/master/rllib/examples/rock_paper_scissors_multiagent.py)
  * [multi-agent parameter sharing: waterworld](https://github.com/ray-project/ray/blob/master/rllib/examples/multi_agent_parameter_sharing.py)
  * [multi-agent independent learning: waterworld](https://github.com/ray-project/ray/blob/master/rllib/examples/multi_agent_independent_learning.py)
  * [multi-agent leela chess zero](https://github.com/ray-project/ray/blob/master/rllib/examples/multi-agent-leela-chess-zero.py)
- * [PR: connect four self-play with pettingzoo](https://github.com/ray-project/ray/pull/33481)
 
 [//]: # (TODO: test waterworld, leela chess zero, add PR to pettingzoo if it isn't merged)
 
@@ -48,3 +48,7 @@ See the [documentation](https://docs.ray.io/en/latest/rllib/index.html) for more
 pistonball
 holdem
 ```
+
+pistonball
+holdem
+```