Only played with the O's for half a season, but a big part of their history. Holtzman was traded from the A's to the O's, along with Reggie, for Baylor and Mike Torrez in April, 1976. Fun fact: I saw Reggie's first game in an O's uniform on May 2, 1976. It was the second game of a double header, coincidentally against his former club - the A's. I don't remember much about Holtzman other than he complained about salary his entire time with the Orioles. Free agency was set to begin after the '76 season and a lot of guys were looking forward to getting paid. In August he was a big piece of the the trade with the Yankees that brought us Dempsey, McGregor, Tippy, Rudy May and Dave Pagan. In 1977, they traded Rudy May and two no names to Montreal for Gary Roenicke, Joe Kerrigan, and Don Stanhouse. So, Holztman played a huge role in Orioles history.
I remember my brother telling me how good Holtzman was when we got him. It just didn't work out for him in Baltimore, as he just didn't want to be here. As such, I always had a negative view of him. Looking back, I certainly can understand his position at the time. In the MLB link below they show him during an A's broadcast sometime recently. Seems like he was liked by his team mates, at least Ray Fosse, and a nice guy. Thanks Ken for your contributions to those great Oriole teams of the late 70's and early 80's and thanks for being a part of my child hood. I always remembered you.
https://www.mlb.com/news/ken-holtzman-dies