Premier League legend Rory Delap has revealed that his son Liam was reduced to tears as a child as overzealous parents accused him of "ruining the game" with his long throws. The 49-year-old was the long throw-in king during his playing days, and as a result, his offspring appear to find it hard not to be tarred with that same brush. And when Liam was at primary school, one incident stung the Delap family.The 49-year-old became synonymous with long throws during his days at Stoke City, as defences quivered in fear at his javelin-like delivery into opposition boxes. While Delap senior became a cult figure for his howitzer set pieces in the 2000s, there appeared to be a negative knock-on effect for his son. Rory recalled how he agreed to stand in for Liam's coach for one game when he was at primary school - and it left a lasting impression. Talking to the Derbyshire FA/DerbyUniFootyJournos podcast On The Grass, Delap recalled: "The coach wasn’t able to be there and the game would have been postponed, so he asked me to take it for him. Unfortunately, in the game, the team was losing. And then there was 30 seconds left or something. Liam took two long throws, I’m talking aged seven or eight. We scored from them. Their parents are going berserk: ‘You’re ruining the game!’ So Liam was in tears even though they’ve won. That’s probably the last time he took a throw in. And that was the end of my grassroots coaching career.”The 22-year-old has had a bright start to his career, graduating from Manchester City's academy to their first-team, securing a move to Ipswich Town, where he impressed in the Premier League, and then sealing a £30 million ($39.5m) summer move to Chelsea. Naturally, the former Southampton and Derby County man is very proud of what the striker has accomplished thus far."I’m immensely proud of Liam, of all three of my sons and my daughter," he said. "People think Liam’s had an easy route, and it’s anything but. He’s had his ups, his downs, but he’s always stayed focused that he could make it. He had to leave home, make a decision to leave home at 16, go to Manchester not knowing really what the situation was, but he’s always backed himself. I’ve always said, ‘if you work as hard as possible so there’s no excuse, you never know where it’s going to get you – treat people with respect, see where it takes you’. He’s not there yet. He’s had a big move in the summer to Chelsea, a big opportunity for him. Liam’s been unfortunate with the (hamstring) injury, he started well in America and then the start of the season, but he’s got a lot to do to force his way into the team now."Among many talking points this season, the return of long throw-ins has been a big one. Arsenal, Brentford, and Sunderland have utilised the tactic well as teams look to find other ways to unlock defences. And according to Delap, this trend is partly in response to Pep Guardiola's tactics being so effective in the past 15 years or so.He added: "If you look over the last 10 years, Pep’s had a big influence on how teams, not just in the Premier League play, but across the board. Pep’s always had the best players in the world to work with, which makes things a lot easier. You can go down to the non-league divisions and see it there as well – where teams are trying to play their way out. It’s the same with academies, the majority of the teams will look to play out and they want technical players. The consequence of that is you end up with the defenders that can’t defend and head the football. That’s become prevalent, that people are putting more long balls in because the lads that have come through the academies don’t understand how to defend that type of situation. So you’re seeing the longer balls, throw-ins, set plays. There’s a correlation in a lot of teams having set play coaches, but it’s a bit disrespectful to say that’s a new thing, because it’s not. It was just that before it was the coach’s or the manager’s job to do it as part of the plan, the programme. So it’s no less or no more important today than it was. Teams are doing it because they’re getting success."Delap, who has just returned from a hamstring injury, is not on long throw-in duty for Chelsea. However, he will hope to be very effective for Enzo Maresca's team when they host Premier League basement side Wolves on Saturday.