Sloat was a lobbyist for the 49ers at the time.

Ortiz identified the lawmaker as state Senate President Pro Tem Darrell Steinberg (D-Sacramento). Steinberg said in a statement to The Times that he bought tickets to the game for himself and family members and that access to the field was arranged by the 49ers.

Bob Lange, a spokesman for the football team, said there is no monetary value to a field pass because it cannot be bought, and therefore it need not be reported as a political gift.

Winuk said his investigators determined that in the case of the football game, there "was no evidence that supported a violation of the law."

Gov. Jerry Brown and 36 other politicians who were found to have received improper contributions from Sloat were sent letters from Winuk's agency advising them of the situation.

The letters say state investigators determined that the officials did not know that Sloat covered some fundraising expenses for them.

Bob Stern, a former general counsel for the ethics agency and coauthor of the state's Political Reform Act, said the fine Sloat received — a record for a lobbyist — is a wake-up call.

"It's going to make everybody much more careful," at least for now, Stern predicted.

patrick.mcgreevy@latimes.com

paige.stjohn@latimes.com