Rachel dates Joshua Burgin for 5 episodes in Season 4.
The two of them meet for the first time while she is working as a personal shopper at Bloomingdale's.
He begins crying, and doesn't stop for hours, delaying their date and making an unappealing night for Rachel. Tag appears in 7 episodes between Season 7 and Season 8.
Rachel's hires him as her assistant at Ralph Lauren and they eventually date.
Barry marries Mindy in the season two finale, "The One With Barry and Mindy's Wedding", where Rachel makes an appearance as one of Mindy's bridesmaids.
Rachel then invites Joshua to a fake party at Monica and Rachel's apartment with the friends where Rachel wears her High school cheerleading outfit, which leads Joshua to fall for her.
The two finally date, but break up after Rachel hastily proposes to Joshua after 4 dates in "The One With All The Wedding Dresses".
Rachel briefly regrets leaving Tag but shrugs it off.
In season eight, after Rachel is revealed to be pregnant, Phoebe recognizes a red sweater that the father of Rachel's baby wore and thought it was Tag's.
Rachel refers to her relationship with Paolo as the complete opposite of her relationship with Barry.