was the above writer related to theatre?
Yes.
William Shakespeare
It is not known definitively when Shakespeare began writing, but contemporary allusions and records of performances show that several of his plays were on the London stage by 1592. By then, he was sufficiently known in London to be attacked in print by the playwright Robert Greene in his "Groats-Worth of Wit":
what would 30 pieces of silver be worth today Between $185 and $216 . what does it refers to actually? It was the price for which Judas Iscariot betrayed Jesus. how is it referred in literature? The phrase "30 pieces of silver" is used more generally to describe a price at which people sell out. is it in use in modern times? Yes, in works like "Crime and Punishment", "Henry IV, Part 2",and  "Treasure Trove". is this second one a drama or novel? A drama. who wrote it? William Shakespeare. who is the main protagoist here? Prince Hal. what was it adapted to? Three BBC television films.
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William Shakespeare [SEP] London and theatrical career
It is not known definitively when Shakespeare began writing, but contemporary allusions and records of performances show that several of his plays were on the London stage by 1592. By then, he was sufficiently known in London to be attacked in print by the playwright Robert Greene in his "Groats-Worth of Wit": ... there is an upstart Crow, beautified with our feathers, that with his "Tiger's heart wrapped in a Player's hide", supposes he is as well able to bombast out a blank verse as the best of you: and being an absolute "Johannes factotum", is in his own conceit the only Shake-scene in a country.