Complex sentence: Peko attended La Serna High School and first played at the collegiate level at Cerritos College and transferred to Michigan State University and has spent 4 years in the NFL, at first primarily as a backup and started in 11 games including playoffs before injuries plagued Peko.
Split into simpler sentences: Peko attended La Serna High School and first played at the collegiate level at Cerritos College before transferring to Michigan State University. He played in the NFL for 4 years, at first primarily as a backup and started in 11 games including playoffs before injuries plagued Peko.