Arron Chelmick attacked Benjamin Goulding with a glass bottle, a court heard.
He was found guilty of unlawful wounding after the attack in the middle of Wem last summer.
The jury, sitting at Shrewsbury Crown Court, convicted 25-year-old Chelmick following a trial.
But he was cleared of a more serious charge of wounding with intent.
Chelmick was accused of wounding Benjamin Goulding on July 6 last year.
Mr Timothy Sapwell, prosecuting barrister, told the jury that Chelmick threw a bottle of beer at Mr Goulding.
The bottle struck him on the back of his head as he was cycling through the town.
The victim then got off his bike and confronted Chelmick, the court heard.
He picked up the defendant by his legs and threw him to the ground.
As the confrontation continued, Chelmick then retaliated by hitting the victim in the face with another glass bottle, causing serious injuries, the jury was told.
Chelmick, also known as Arron Harding or Arron Bate, denied wounding.
He claimed that Mr Goulding received his facial injuries when he threw him to the floor.
Chelmick, of High Street, Wem, will be sentenced at a later date, when he will be required to return to Shrewsbury Crown Court for the hearing.