If I understand your setup correctly, you (a) will be building the formatted bibliography entirely by hand and (b) wish to create authoryear-style citation call-outs rather than numeric citation call-outs.
If this understanding is correct, I suggest you (a) load the natbib
citation management package with the option authoryear
and (b) provide more citation-related information in the optional argument of \bibitem
. Inside the optional argument, list the author(s) and then the publication year, with the publication year encased in parentheses, and no space between the author name(s) and the (year)
.
Ideally, though, you'd decide to learn how to use BibTeX and select a suitable bibliography style, so that you don't have to do all this stuff by hand.

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[hyphens]{url}
\usepackage[authoryear,round]{natbib}
\begin{document}
textual citation: \citet{Ackerman}
parenthetic citation: \citep{Ackerman}
\begin{thebibliography}{9}
\bibitem[Ackerman(2017)]{Ackerman} Ackerman, E. (2017) Why the English Premier League Should Have Playoffs. Balls.ie. Available at: \url{https://www.balls.ie/football/premier-league-playoffs-364654}
\end{thebibliography}
\end{document}
\cite
which would normally generate a number (so removing numbers from the list being confusing) if you don't have\cite
you don't really need thebibliography at all. You could just use an itemize or even a paragraph.\cite
makes [1] so requires the [1] in the bibliography to make sense. Or do you want an author-year citation style and change both the citation and the list or ....