This pressure to succeed and fit into the team structure can force these athletes to participate in performance-enhancing drugs or risk losing the contract they have worked hard for. If the team does not support taking PEDs, then athletes may rely on outside help to gain an advantage over competitors within their own team and oppositions. In these cases, athletes may seek advice from doctors outside their organization who are willing to provide performance-enhancing drugs (Dunn, George, Churchill, Spindler 2007). Medications aren't the only way to potentially improve performance. Some athletes undergo surgical procedures to improve their performance, for example baseball pitchers undergo replacement of shoulder tendons after a knee tendon injury (Thompson 2012). However, these improvements are not illegal. It's no different than bike manufacturers pushing the rules so they can develop aero bikes. How far could the human body really go before it goes too far (Thompson, Helen 2012) or have we already gone that far ?