Purpose: The purpose of this study was to understand nine physical education (PE) teachers' experiences with an asynchronous professional development module focused on science, technology, engineering, and mathematics (STEM) integration, and the barriers they perceived to integrating STEM into PE. Methods: Semistructured interviews, pre- and post open-ended questionnaires, and discussion board posts were analyzed through a collaborative coding process. Trustworthiness was increased by using a peer debriefer, multiple coders, negative case checks, and data triangulation. Results: Four themes describe the experiences of PE teachers learning to integrate STEM into PE: teacher's knowledge about technology and STEM, barriers to PE teachers in integrating STEM, "We're already integrating STEM," and issues in professional development. Discussion/Conclusion: STEM integration is possible if PE teachers are provided time and opportunities to work with content experts to learn STEM concepts and have STEM be a by-product of PE lessons rather than the sole focus of the lesson.