Simplify the following text for a Grade 6 native English-speaking person.
Original: Initially named California Seals , the team was renamed Oakland Seals part-way through the 1967 â `` 68 season , and then to California Golden Seals in 1970 .
Simplified: The Golden Seals entered the league at the start of the 1966-67 NHL season as the Oakland Seals . In the 1970-71 season , the team was renamed to the California Golden Seals .