A lot of "big" bat rays have been reported over the years but it's hard to say how accurate some of these (guesstimates?) actually were.
≈ 220 Lbs. — Ventura Pier, early ‘80s
Source: PFIC
203 Lbs. — Stearns Wharf (Santa Barbara), James Elledge, April 24, 2004
Source: Personal comm. Boyd Grant; PFIC
200 Lbs. — Carpinteria Pier, Bill Hinckley, September 18, 1955
Source: Los Angeles Times, September 19, 1955
≈ 200 Lbs. — Huntington Beach Pier, May 2014
Source: Let’s Go Fishing, Huntington Beach Pier
≈ 200 Lbs. — Huntington Beach Pier, December 2009
Source: Let’s Go Fishing, Huntington Beach Pier
≈ 200 Lbs. — Oceanside Pier, April 2006
Source: Oceanside Pier Bait Shop
≈ 200 Lbs. — Seal Beach Pier, March 2001
Source: Big Fish Bait & Tackle, Seal Beach
≈ 200 Lbs. — Ocean Beach Pier, August 1998
Source: PFIC
≈ 200 Lbs. — Hermosa Beach Pier, “Mola Joe”, 1980s
Source: PFIC
≈ 200 Lbs. — Redondo Wharf No. 1, June 25, 1888
Source: Los Angeles Herald, June 27, 1888
181 Lbs.* — Huntington Beach Pier, Bradley. A. Dew, July 24, 1978
Source: Los Angeles Times, July 28, 1978 & California Dept. of Fish and Wildlife * = Official state record fish
175 Lbs. — Aliso Beach Pier, August 1984
Source: Aliso Beach Pier Snack Shack
≈ 170 Lbs. — Seal Beach Pier, May 2001
Source: Big Fish Bait & Tackle, Seal Beach
169 Lbs. — Hermosa Beach (pier?), July 30, 1912
Source: Oakland Tribune, July 30, 1912
160 Lbs. — Ocean Beach Pier, May 2009
Source: PFIC
≈ 160 Lbs. — Seal Beach Pier, March 2001
Source: Big Fish Bait & Tackle, Seal Beach
150+ Lbs. — Santa Monica Pier, May 2008
Source: Santa Monica Pier Bait Shop
150 Lbs. — Santa Monica Pier, May 2002
Source: Santa Monica Pier Bait Shop
150 Lbs. — Rainbow Pier (Long Beach), David Feske, June 17, 1960
Source: Long Beach Independent, June 18, 1960
≈ 150 Lbs. — Oceanside Harbor Pier, August 2009
Source: PFIC
≈ 150 Lbs. — Oceanside Pier, April 2001
Source: Oceanside Pier Bait Shop
≈ 140 Lbs. — Seal Beach Pier, March 2001
Source: Big Fish Bait & Tackle, Seal Beach
135 Lbs. — San Clemente Pier, June, November 1999
Source: PFIC
125 Lbs. — Huntington Beach Pier, Greg Taite, April 1999
Source: Let’s Go Fishing, Huntington Beach Pier
125 Lbs. — Rainbow Pier (Long Beach), Paul Harmon, May 13, 1964
Source: Long Beach Independent, May 15, 1964
123 Lbs. — Huntington Beach Pier, Robert Gerber, March 1999
Source: Let’s Go Fishing, Huntington Beach Pier
120 Lbs. — Ocean Park Pier, Stuts Baida, July 1927
Source: Los Angeles Times, July 31, 1927
110 Lbs. — Pine Avenue Pier (Long Beach), William Crowder, June 2, 1907
Source: Los Angeles Herald, June 2, 1907
106 ½ Lbs. — Belmont Pier (Long Beach), Bill Kerny, October 13, 1960
Source: Long Beach Independent, October 14, 1960
104 Lbs. — Rainbow Pier (Long Beach), Dave Feske, October 13, 1960
Source: Long Beach Independent, October 14, 1960
100+ Lbs. — San Clemente Pier, December 23, 2017
Source: Hogan’s Bait and Tackle (Dana Point)/PFIC
100+ Lbs. — Embarcadero Marina Pier (San Diego), June 24, 2002
Source: Harbor Bait & Tackle
100+ Lbs. — Stearns Wharf (Santa Barbara), June 1997
Source: Mike’s Bait & Tackle, Stearns Wharf, June 1997
100 Lbs. — Seal Beach Pier, April 1958
Source: Long Beach Independent-Press Telegram, April 13, 1958
≈ 100 Lbs. — Newport Pier, Isador Greenbaum, August 1992
Source: Tustin News, August 27, 1992
≈ 100 Lbs. — Santa Cruz Municipal Wharf, Walter Cartwright, April 11, 1934
Source: Santa Cruz Sentinel, April 12, 1934